pch

4.6.1 Filtered output of Band 1-4 via an analogue AC output

With a PCH 1216 it is also possible to have the filtered output signal of any of the four (4) Bands

directly presented at an analogue AC output with a maximum measurable frequency of 1000 Hz.

The output signal of the SSD band is NOT available this way.

Please note that there are four bands but generally only two (optionally three) analogue outputs.

4.6.2 RAW data export via an analogue AC output

A PCH 1216 or PCH 1218 has the possibility to export RAW data that is taken from the device

after the RAW band filter. The maximum measurable frequency is 35 Hz. However, unless the

optional 3rd analogue DC output is mounted and enabled, it is only possible to receive RAW data

from any two of the three directions.

PCH 1216

Page 18

4.7 CANopen (pin #5+6+8 or #6+7+8))

The PCH 1218 device (only) can communicate with a PC or PLC by using the CANopen protocol.

The use of the CANopen feature requires three connections to be made:

- CANopen – LOW at

~ pin #5 for a PCH 1218 with an 8-pin connector

~ pin #7 for a PCH 1218 with a 12-pin connector

- CANopen – HIGH at

~ pin #8 for a PCH 1218 with an 8-pin connector

~ pin #8 for a PCH 1218 with a 12-pin connector

- CANopen – GND at

~ pin #6 for a PCH 1218 with an 8-pin connector

~ pin #6 for a PCH 1218 with a 12-pin connector

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

There is one receive PDO and there are nine transit PDOs with the following definitions:

- RECEIVE PDO : Alarm inhibit band 1-4; Ramp-test; SSD-test; Self-test; Alarm reset

- TRANSIT PDO1 : Raw data from sensor 1, one data sample every 10 ms

- TRANSIT PDO2 : Raw data from sensor 2, one data sample every 10 ms

- TRANSIT PDO3 : Raw data from sensor 3, one data sample every 10 ms

- TRANSIT PDO4 : Internal Compatibility Word (ICW); Optimized status 1 (= monitor status);

Optimized status 2 (= general status band 1-4 plus SSD band); Danger alarm

status 1-4 plus SSD; Alert alarm status 1-4

- TRANSIT PDO5 : Band SSD measuring result; measurement unit; sequence number

- TRANSIT PDO6 : Band 1 measuring result; measurement unit; sequence number

- TRANSIT PDO7 : Band 2 measuring result; measurement unit; sequence number

- TRANSIT PDO8 : Band 3 measuring result; measurement unit; sequence number

- TRANSIT PDO9 : Band 4 measuring result; measurement unit; sequence number

By setting/toggling certain bits in the PDO using software CHT 5017 (CANopen master control and

display program), which has been released by the manufacturer PCH Engineering A/S, it is possible

to inhibit the alarms of all four Bands 1-4 individually, carry out a ramp-test, initiate a Self-Test,

initiate a general Alarm re-set (NOT SSD Danger alarm reset) or initiate a dedicated SSD-Test (i.e.

also SSD re-set).

Warning:

In principal – according to the GL2010 guide lines – the SSD test/re-set is to be carried

out by a technician that is personally present in the wind turbine (nacelle). However, if

the wind turbine is densely surveyed by means of cameras (and microphones) that are

positioned both inside and outside the wind turbine thus giving a technician in a remote

control room a full overview of the wind turbine’s operational condition, it is allowed to

initiate the SSD test from this remote control room. See the GL2010 certification guide

lines, chapter 2.2.2.5 on the subject of camera surveillance.

Page 19

Note:

By default the PCH 1218 does NOT come with an internal 120 Ω termination resistor

installed. However, such a resistor must be installed in a PCH 1218 device that happens

to be the last device in the CanBus chain. When ordering please specify the presence of a

120 Ω termination resistor by adding R0 (not installed, default) or R1 (installed) to the

CHF838xxx number: CHF838xxxR0 or CHF838xxxR1. See your Customer Specification Agreement (section 2) for more information on this topic.

4.8 Power/Digital/Signal GND (pin #7 or #10)

Digital input signals and analogue DC outputs are all relative to the ground potential on:

- pin #7 for PCH 1216 and PCH 1218 devices with an 8-pin connector

- pin #12 for PCH 1216 and PCH 1218 devices with a 12-pin connector

Pin #7 or pin #12 is also the power ground potential for the +24 VDC connection at pin #1.

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

4.9 Self-Test (pin #8)

The PCH 1216 (only) is provided with a pin in its connector that is dedicated to start a Self-Test of

the device by connecting this pin with digital GND. The Self-Test function tests the integrity of the

total device, incl. the transducers:

- pin #8 for all PCH 1216 devices

The corresponding digital ground (GND) is available at:

- pin #7 for a PCH 1216 device with an 8-pin connector

- pin #12 for a PCH 1216 device with a 12-pin connector

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

If the test is successful the unit will – after a short settling time – return to the stand-by mode,

indicated by a green status LED on the enclosure.

If the test is not successful the unit will – after a short settling time – go to the System Error mode,

indicated by a red status LED on the enclosure.

Only individual functions/features can be addressed during a self-test. But there are NO

consequences, i.e. no alarms will be triggered if a certain vibration level set during self-test exceeds

an alarm trigger level. If an alarm must be triggered during self-test the alarm in question must be

marked. The behaviour of outputs during a self-test must also be specified separately.

4.9.1 Self-Test using the optional RS485 ModBus connection

Both a PCH 1216 and a PCH 1218 can be set into self-test mode using a mounted (optional) and

enabled RS485 ModBus connection. The self-test can then e.g. be started by the PCH Vibration

Studio software.

4.9.2 Self-Test using the CANopen FieldBus protocol

The RECEIVE PDO includes a bit that is used for initiating and then stopping a self-test of a PCH

1218 device (only). See section 4.7 of this manual.

Page 20

4.10 RS485 ModBus communication (pin #5 and #9)

Optionally any PCH 1216 or PCH 1218 can be purchased with a RS485 ModBus function for

communication with a PC or a PLC. Such a device will always have a 12-pin connector.

The RS485 ModBus function is a useful feature in the R&D phase of a new model of wind turbine

because it allows full control of the device by PC using the PCH Vibration Studio software, which

has been released by the manufacturer PCH Engineering A/S.

The PCH Vibration Studio software in connection with a RS485 Modbus function has the

possibility to read measuring results, read the status flags of many functions/features in the device

and last but not least allows the operator to alter the parameter set-up of the device in order to

optimize it for the wind turbine (machine).

To connect a PCH 1216 or PCH 1218 device to the RS485 field bus requires two connections:

- RS485 +: pin #5 for a PCH 1216 or PCH 1218 device with a 12-pin connector

- RS485 –: pin #9 for a PCH 1216 or PCH 1218 device with a 12-pin connector

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

Note:

The RS485 ModBus maybe used while all measuring chains are operational.

Note!

By default a PCH 1216 or PCH 1218 does NOT come with an internal 120 Ω

termination resistor installed. However, such a resistor must be installed in case the

device happens to be the last device in the RS485 chain. When ordering please specify

the presence of a 120 Ω termination resistor by adding R0 (not installed, default) or R1

(installed) to the CHF836xxx or CHF838xxx number, e.g CHF836xxxR0 and

CHF838xxxR1. See your Customer Specification Agreement (section 2) for more

information on this topic especially if there is a RS485 ModBus and a CANopen

FieldBus installed in the same device.

4.11 Light Emitting Diode (Status LED) on enclosure

On the stainless steel enclosure, just above the connector, you will find a LED that is used to

indicate the current status of a PCH 1216 or PCH 1218:

Status

: Green:

- Static

: Normal operation. Power ON

- Flashing

: Settling

Red:

- Static

: SSD alarm or System Failure

- Flashing

: Update mode

Yellow:

- Static

: SSD Danger alarm relay test

- Flashing

: Sensor test

Page 21

4.12 CHB 1131 Service Cable

The CHB 1131 Service Cable allows easy direct communication between the USB 2.0 port of a PC

and one PCH 1216 or PCH 1218 device . A CHB 1131 will also provide main power to the device.

There are two versions of the Service Cable available:

- CHB 1131P8: USB 2.0 Service Cable for a PCH 1216 or PCH 1218 with a 8-pin connector

- CHB 1131P12: USB 2.0 Service Cable for a PCH 1216 or PCH 1218 with a 12-pin connector

The CHB 1131 has a small push button that when pressed shortly will start a SSD self-test.

Together with the PCH Vibration Studio software the CHB 1131 Service Cable can be used to gain

full control over a PCH 1216 or PCH 1218 but….. only one at the time.

The CHB 1131 Service Cable also enables (individual) communication with PCH 1216 or PCH

1218 devices that elsewhere do not have a communication feature included in their hardware and/or

firmware.

Note!

Please be advised that when using a CHB 1131 Service Cable, the connected device will

be in off-line mode.

4.13 CHB 1134 Service Adaptor

The CHB 1134 Service Adaptor allows easy direct communication between the USB 2.0 port of a

PC and one PCH 1216 or PCH 1218. A CHB 1134 will also provide main power to the device.

Page

5 System Failure Monitoring

5.1 System Failure Monitoring

System Failure Monitoring is a self-monitoring so-called watchdog feature of both the PCH 1216

and the PCH 1218 devices. It ensures that under no circumstance can an erroneous measurement

occur without causing a System Failure.

The continuous operative self-monitoring System Failure procedure is based on a number of

possible error conditions, as described in the sections below:

5.1.1 Errors related to the set-up of the monitor and the input signal

The System Failure system detects that the measurement (results) could be compromised.

- Overload in input section (accelerometer signal too large)

- Overload of DC output

Remedy: Both errors can be corrected by checking the cables and/or the set-up of the monitor.

5.1.2 Errors related to the environmental conditions

The system Failure system detects that something is wrong with the external conditions under

which the device operates:

- Power failure

- Internal temperature exceeding limits

Remedy: Both errors can be corrected by improving the environmental conditions.

5.1.3 Errors related to the hardware and the firmware of the Monitor

The System Failure system detects a malfunction of the PCH 1216 or PCH 1218.

- Error in set-up data

Remedy: Reload the set-up. If this does NOT help, the unit must be returned to the manufacturer

for repair. Please refer to section Error! Reference source not found. of this User

anual for more details on how to get your device serviced/repaired.

5.1.4 Errors that only PCH Engineering A/S service personnel can correct

- Persistent error detected by Self-test

- Error in factory calibration data

- Digital Signal Processor stop or error in hardware and/or firmware

Remedy: Only possible at factory level. Please return the PCH1216/1218 to the manufacturer for

repair. Please refer to section Error! Reference source not found. of this User Manual

or more details on how to get your device serviced/repaired.

216/1218 structural vibration monitor with SSD function

Page 24

5.2 System Failure Relay

The PCH 1216 and PCH 1218 devices do NOT have a dedicated System Failure relay. Instead a

PCH 1216 or PCH 1218 device uses the SSD Danger relay(s) for this purpose. The System Failure

(= SSD) relay(s) trigger on any of the system failure conditions described above. The System

Failure Relay remains active until the reason for the fault is eliminated and the same relay(s) are

therefore NOT latched like when they are activated by a SSD alarm.

The System Failure Relay is energized (i.e. in make condition) when no system failures are active

(stand-by), and de-energized (i.e. in break condition) when in system failure mode (activated). In

this way the relay will also indicate a system failure when the power goes off, which is a system

error by itself.

Warning!

The relay(s) are so-called contact relay(s). Excessive current (and/or voltage) will

destroy the relay. For this reason please do not apply any power source directly to the

relay. Protect the relay with a resistor in series that will limit the current.

Please make sure that the following ratings/conditions for the relay(s) are not exceeded in your

application:

- Max load voltage : 48 VDC

- Maximum current load : 100 mA

- Maximum power load : 5 Watts

5.3 System Failure Indicator

The status LED on the enclosure will turn red as soon as a System Failure occurs. At the same time

“System Failure” indicator(s) within the PCH Vibration Studio software will turn red.

5.4 Finding the reason of a System Failure

Detailed information concerning the reason that might have caused the System Failure alarm can be

found at the bottom of the “Results” display that belongs to the PCH 1216 or PCH1218 in question

in the PCH Vibration Studio software:

Another source of useful information could be available in the columns “Category”, “Description”

and “Source” of the “Status and Events” display in the same software:

Page 25

6 Power Source

6.1 Voltage Range

A PCH 1216 or PCH 1218 must be powered by a +24 VDC (i.e. 10,5 – 30,0 VDC) power supply

via its pin #1.

Power GND can be found at:

- pin #7 for a PCH 1216 or PCH 1218 device with an 8-pin connector

- pin #12 for a PCH 1216 or PCH 1218 device with a 12-pin connector

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

For more details on this subject, please read sections 4.3 (on +24 VDC) and 4.8 (on GND) of this

manual.

6.2 Power ON LED

When the status LED on the enclosure of a PCH 1216 or PCH 1218 device is radiating green,

yellow or red light – either continuously or in flash mode – this indicates that the device is properly

powered.

Page 26

7 Connecting for (remote) control

A PCH 1216 or PCH 1218 can be remotely controlled:

- when part of a RS485 ModBus chain of devices. Such a data connection is first-off-all intended

for reading out result data, as well as status information, but can also be used for set-up and

(remote) field maintenance. On-line communication is possible while the device is operational

- using the CANopen FieldBus protocol. This way of communication is limited to collect raw

vibration level data directly from the sensor, measuring results from the four conditioning bands,

as well as status concerning the SSD Danger alarm. In addition it is possible to start a Self-Test,

a SSD-test or a Ramp-test. The CANopen protocol does not allow changing the parameter setup

of the device!!! On-line communication is possible while the device is operational

- using a LAN connection with an optional CHB 1120 Etherbridge. The CHB 1120 will be

connected on one side to the on-site LAN while the other side is connected to either one (max

two) RS485 ModBus chains of PCH 1216 and/or PCH 1218 device(s). Using this way of

communication gives full control of one or many PCH 1216 and/or PCH 1218 devices at the

same time. On-line communication is possible while the device is operational

- using a USB connection with an optional CHB 1120 Etherbridge. The CHB 1120 will be

connected on one side to the USB 2.0 connector of a (tablet-)PC while the other side is

connected to either one (max two) RS485 ModBus chains of PCH 1216 and/or PCH 1218

device(s). Using this way of communication gives full control of one or many PCH 1216 and/or

PCH 1218 devices at the same time. On-line communication is possible while the device is

operational

- using the correct version of CHB 1131 Service Cable or CHB 1134 Service Adaptor in off-line

mode!!! See section XXX for more information

Warning!

It is the operator’s responsibility to use a PC that is conforming to the standard EN/IEC

60950 and that the environment in which the PC is located is within the temperatureand humidity range specified by the PC manufacturer. Also make sure that the PC is

still conform standard EN/IEC 60950 when connected to the PCH 1026 Mk2.

All input/output registers can be accessed from the main ModBus interface, but only a subset

(SubBus) can be accessed from the MultiBus (Fieldbus) interface

CHO 1115-01

Measurement

Setup

MultiBus

CANopen or Interbus,

Profibus or CAN,

or Devicenet or ....

Measurement

Control

MultiBus

Setup

SubBus

RAW AC 10ms

Direct from DSP

ModBus

PCH 1026

ModBus

RS232 or

RS485

FieldBus

Page 27

PC PCH1216/18

Terminal DATA +

Terminal DATA -

120 W Termination resistors

Master Slave(s)

7.1 Data transfer via RS485 Modbus RTU (Optional)

A PCH 1216 or PCH 1218 device is capable of remote communication via an optional RS485 Serial

Multi-drop interface at distances of up to 1200 m. Connection of more than 32 slaves, or wiring

over distances of more than 1200 m, is only possible in combination with a RS485 repeater. Up to a

maximum of 247 slaves can be addressed in one RS485 chain.

Always connect the RS485 ModBus cable to:

- RS485+ at pin #5 for a PCH 1216 or PCH 1218 device with a 12-pin connector

- RS485– at pin #9 for a PCH 1216 or PCH 1218 device with a 12-pin connector

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

Note!

For your RS485 connections, please always use a RS485 certified two-wire twisted and

shielded cable.

To ensure the best noise immunity, the cable has to be terminated with a 120 W resistor at both ends

of the chain, i.e. immediately after the connection to the PC/PLC and immediately before the

connection to the last device in the chain.

Note!

By default a PCH 1216 or PCH 1218 does NOT come with an internal 120 Ω

termination resistor installed. However, such a resistor must be installed in case the

device happens to be the last device in the RS485 chain. When ordering please specify

the presence of a 120 Ω termination resistor by adding R0 (not installed, default) or R1

(installed) to the CHF836xxx or CHF838xxx number, e.g CHF836xxxR0 and

CHF838xxxR1. See your Customer Specification Agreement (section 2) for more

information on this topic especially if there is a RS485 ModBus and a CANopen

FieldBus installed in the same device.

PCH1216/18

Connection to RS485 ModBus

Page 28

All registers can be accessed via the PCH1216/1218 ModBus interface. The RS485 interface

includes a register address range referred to as SubBus. Registers in the SubBus area are also

available on the MultiBus interface.

The RS485 ModBus address can be set from 1 to 247. (Default = 1)

The baud rate can be set between 300 and 38400 baud (Default = 38400)

Warning!

Readable data will only be present at the SubBus if the PCH1216 or PCH 1218 device is

in measuring mode. This prevents false readings.

Warning:

Please make sure that you do not add a new device to your FieldBus that has an address

occupied by another device already present in the RS-485 chain of devices.

7.2 Data transfer via CANopen

The CANopen standard used is: CIA DS301 revision 4.

All the data from the SubBus can be transmitted via the CANopen interface, including

measurement results, alarms and status. Also a 10ms sample rated RAW AC signal for each of the

three vibration directions A, B and C is available on the CANopen.

To run the monitor in a CANopen network, it is necessary to set the Node Address so it will not

conflict with other components on the same segment of the bus. This is easily done by PCH

Vibration Studio software with ModBus access via RS485 or by using a CHB 1131 Service Cable

or CHB 1134 Service Adaptor. The default node address is: 2.

7.2.1 CANopen MultiBus protocol

A PCH 1218 is equipped with a set of registers called SubBus registers. These registers are meant

as an easy and fast option to get essential status and selected results from the monitor.

It is possible to configure the MultiBus interface via the RS485 ModBus interface from a PC/PLC

or other similar equipment, but the easiest way to set up everything around the SubBus/MultiBus is

with the PCH Vibration Studio software.

Warning!

Values will only be present at the SubBus if the PCH 1218 has been or is in Measuring

State. This prevents false readings.

Warning!

Only results defined in the SubBus area are available at the MultiBus interface (the

installed Fieldbus).

Whether or not a particular PCH 1218 device has a RS485 ModBus installed can be seen from type

number label, which indicates the presence of the termination resistor. Another good (but NOT

conclusive) indicator of an embedded RS485 ModBus RTU in a PCH 1218 device is the presence

of a male 12-pin connector on the side panel of the enclosure.

Page 29

7.2.2 Input/Output data transfer

In case you need more information than described below on how to make a PCH 1218 device

communicate with a PC or PLC using the CANopen protocol, please contact the manufacturer PCH

Engineering A/S for more detailed information.

Note:

By default the PCH 1218 does NOT come with an internal 120 Ω termination resistor

installed. However, such a resistor must be installed in a PCH 1218 device that happens

to be the last device in the CanBus chain. When ordering please specify the presence of a

120 Ω termination resistor by adding R0 (not installed, default) or R1 (installed) to the

CHF838xxx number: CHF838xxxR0 or CHF838xxxR1. See your Customer Specification Agreement (section 2) for more information on this topic.

There is only one RECEIVE PDO and but there are nine TRANSIT PDOs.

By setting/toggling certain bits in the SEND PDO using software CHT 5017 (CANopen master

control and display program), which has been released by the manufacturer PCH Engineering A/S,

it is possible to inhibit the alarms of all four Bands 1-4 individually, carry out a ramp-test, initiate a

Self-Test, initiate a general Alarm re-set (NOT SSD Danger alarm reset) or initiate a dedicated

SSD-Test (incl. a SSD alarm re-set).

- RECEIVE PDO : Alarm inhibit band 1-4; Ramp-test; SSD-test; Self-test; Alarm reset

- TRANSIT PDO1 : Raw data from sensor 1, one data sample every 10 ms

- TRANSIT PDO2 : Raw data from sensor 2, one data sample every 10 ms

- TRANSIT PDO3 : Raw data from sensor 3, one data sample every 10 ms

- TRANSIT PDO4 : Internal Compatibility Word (ICW); Optimized status 1 (= monitor status);

Optimized status 2 (= general status band 1-4 plus SSD band); Danger alarm

status 1-4 plus SSD; Alert alarm status 1-4

- TRANSIT PDO5 : Band SSD measuring result; measurement unit; sequence number

- TRANSIT PDO6 : Band 1 measuring result; measurement unit; sequence number

- TRANSIT PDO7 : Band 2 measuring result; measurement unit; sequence number

- TRANSIT PDO8 : Band 3 measuring result; measurement unit; sequence number

- TRANSIT PDO9 : Band 4 measuring result; measurement unit; sequence number

7.2.3 Export of RAW data from sensors

A PCH 1218 device has the possibility via TRANSIT PDO1, PDO2 and PDO3 to export RAW data

that is taken from the device after the filter but before the detector for each of the three (3) sensors

(A, B and C) respectively.

The data is presented in 10 ms intervals, i.e. 100 times per second. According to the Nyquist

theorem this would allow the transfer of a maximum signal frequency bandwidth of 50 Hz, but 35

Hz is a more practical value. The maximum measurable frequency is therefore limited to 35 Hz.

Page 30

7.2.4 Status and Alarms

RECEIVE PDO4 contains the following information that is available on the SubBus:

- Internal Compatibility Word (ICW)

- Optimized status 1 (i.e. monitor status)

- Optimized status 2 (i.e. general status in conditioning band 1-4 plus SSD band)

- Danger alarm status in conditioning bands 1-4 plus SSD band

- Alert alarm status in conditioning bands 1-4

Outside the SubBus range there will be access to more detailed status. The by default implemented

status information’s should be sufficient in most cases. However, in case the operator needs to read

out not (yet) implemented status information, please consult the manufacturer PCH Engineering

about a possible implementation.

7.2.5 Measurement results

RECEIVE PDO5 through PDO9 contains the measurements of the SSD band and the four (4)

conditioning bands respectively. Also the measurement unit is sent each time, as well as sequence

number that was increased by one (1) after each completed cycle of nine PDOs since the data

collection started.

7.2.6 Self-Test

It is possible to bring the PCH 1218 device in self-test mode by setting the correct bit in the

RECEIVE PDO. Toggling this bit will stop the self-test mode.

7.2.7 SSD-Test and SSD reset

It is possible to bring the PCH 1218 device in SSD-test mode by setting the correct bit in the SEND

PDO. Toggling this bit will stop the self-test mode.

A successfully ended SSD-Test is the only method to make an end to (i.e. reset) an activated SSD

alarm.

Warning:

In principal – according to the GL2010 guide lines – the SSD test/re-set is to be carried

out by a technician that is personally present in the wind turbine (nacelle). However, if

the wind turbine is densely surveyed by means of cameras (and microphones) that are

positioned both inside and outside the wind turbine thus giving a technician in a remote

control room a full overview of the wind turbine’s operational condition, it is allowed to

initiate the SSD test from this remote control room. See the GL2010 certification guide

lines, chapter 2.2.2.5 on the subject of camera surveillance.

7.2.8 Communications settings

The Node Address can be set to a value between 1 and 126. (default: 2)

The Baud rate must also be set, 0..8 ~ [10k,,1000] kBaud. (default 500 kBaud)

Page 31

Warning!

It is not recommended to choose a Baud rate below 125 KBaud with all PDO's 1-9

activated.

Warning!

After changing the Baud rate the vibration monitor must be restarted (e.g. by carrying

out a power OFF/ON).

Note!

Setting of a new node address or new Baud rate is only possible using a CHB1131

Service Cable, a CHB 1134 Service Adaptor (off-line) or a PCH 1218 with a mounted

and enabled RS-485 ModBus interface (on-line).

7.2.9 NO changing of the parameter setup

A basic PCH 1218 device has NO communication facility to alter the parameter setup. For this a

CHB1131 Service Cable, a CHB 1134 Service Adaptor or a PCH 1218 with a mounted and enabled

RS-485 ModBus interface will be required.

Warning!

While changes in the parameter setup using a CHB 1131 or CHB 1134 will be off-line,

they might be carried out on-line with the RS-485 interface, i.e. while all measuring

chains are operational.

7.3 Data transfer via LAN

Any PCH 1216 or PCH 1218 device that has an embedded RS485 ModBus feature can be remotely

controlled/operated using a LAN connection. However, this requires the use of an additional

optional CHB 1120 PCH EtherBridge module.

All PCH 1216 or PCH 1218 devices with embedded RS485 ModBus will have a 12-pin connector.

Page 32

The PCH EtherBridge module is on one side connected to a Local Area Network (LAN) with a

LAN cable. The other side of the EtherBridge has 2 COM ports that both can be configured to act

as the main control unit in a separate RS485 daisy chain of ModBus devices.

On the CHB 1120 EtherBridge side the RS485 port is connected as follows:

For a PCH 1216 or PCH 1218:

- COM1 – pin #14: RS485+ of Modbus chain 1; PCH 1216 or PCH 1218 device pin #5

- COM1 – pin #15: RS485– of ModBus chain 1; PCH 1216 or PCH 1218 device pin #9

- COM1 – pin #16: GND (cable shield) of ModBus chain 1

- COM2 – pin #17: GND (cable shield) of ModBus chain 2

- COM2 – pin #18: RS485+ of Modbus chain 2; PCH 1216 or PCH 1218 device pin #5

- COM2 – pin #19: RS485– of ModBus chain 2; PCH 1216 or PCH 1218 device pin #9

See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

It is allowed to connect a PCH 1216 device to COM1 and a PCH 1218 device to COM2 and v.v.

Warning!

To increase data transfer reliability please use a two wire twisted and shielded RS485

certified cable.

Warning!

To reduce (i.e. improve) the noise sensitivity please do not forget to terminate both

ends of your RS485 ModBus chain with a 120 Ω resistor. Both COM ports of a CHB

1120 have an embedded 120 Ω termination resistor that can be enabled by visiting the

“homepage” available directly in a browser at the IP address of the device or via the

PCH Vibration Studio software while using a LAN connection.

For more information on how to place a PCH 1216 or PCH 1218 device in a chain of devices

connected through a RS485 ModBus, please read section 7.1 of this manual.

For more detailed information concerning the operation of the CHB 1120 PCH EtherBridge we

recommend to read the CHB 1120 PCH EtherBridge user manual.

7.4 Data transfer via CHB 1131/1134 Service Cable/Adaptor

By using an optional Service Cable or Service Adaptor to establish a direct connection between an

USB 2.0 port of a notebook/tablet PC and the circular 8-pin or 12-pin connector on the enclosure of

a PCH 1216 or PCH 1218 device, it is possible to obtain two-way communication with this device.

Whenever a PCH 1216 or PCH 1218 device is connected to a PC by the Service Cable or Service

Adaptor the device will also get its +24 VDC main power this way.

PCH Vibration Studio software facilitates the collection of measurement results and status read-out.

The same software can also be used to make changes in the parameter set-up of a PCH 1216 or

PCH 1218 device.

There are two different Service Cables available:

- CHB 1131P8 : For PCH 1216 or PCH 1218 devices with an 8-pin connector

- CHB 1131P12 : For PCH 1216 or PCH 1218 devices with a 12-pin connector

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There are also two different Service Adaptors available:

- CHB 1134P8 : For PCH 1216 or PCH 1218 devices with an 8-pin connector

- CHB 1134P12 : For PCH 1216 or PCH 1218 devices with a 12-pin connector

The 8-pin version can easily be changed into a 12-pin version of the Service Adaptor by

The Service cable becomes very useful if frequent parameter changes are required, e.g. in the

development phase of a new wind turbine or for a quick update of a PCH 1216 or PCH 1218 device

in the field in connection with the change of one or more set-up parameter(s) or an update/upgrade

of the firmware.

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8 PCH 1216/1218 and PCH Vibration Studio

The PCH Vibration Studio software is delivered on a DVD. The installation of the software is

straight forward and described in detail in the ”CHF 2042 – User Manual for CHT 1044 PCH

Vibration Studio User Software for PCH Vibration Monitors”.

The PCH Vibration Studio software is available in two versions: a Standard version and an OPC

version.

Note!

Any PCH 1216 or PCH 1218 can only be operated together with the OPC version of the

PCH Vibration Studio software.

The installation process automatically installs all necessary drivers.

In order to help the customer maintain the original parameters set-up as unchanged as possible, a

read-only version of the PCH Vibration Studio software is available, where set-up parameters

cannot be changed but only read-out. This is intended for those service personnel who are not

authorized to change parameters. All of our customers are quite happy with this set-up, making

them confident that quality is managed well.

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The PCH Vibration Studio software is a powerful tool to:

- Get a direct readout of the measured vibration parameter(s) of any PCH Engineering vibration

monitor device, including that of PCH 1216 and PCH 1218 devices

- Follow in-time the trends of vibration parameters, incl. alarm indication

- Machine vibration diagnosis by analysing the vibration results of groups of transducers

- Readout the status of the device making it possible to see the reason for certain error indications

like input signal overload and power cut

- Forced (remote) self-test of the device and see how the device reacts under stress

- Change of setup parameters in the laboratory or in the field. Please note: that such action voids

the Customer Specification Agreement setup, if any.

Note!

Please read the PCH Vibration Studio user manual on how to install this software on

your (tablet-)PC. The sections below only describe the basics with regard to how to

parameterise a PCH 1216 or PCH 1218 device. For more detailed information or

subjects like Trend readings, data streaming, off-line FFT analysis, etc. also please

consult the PCH Vibration Studio software User Manual.

All screen dumps shown in this section of the manual are taken from a PC running the PCH

Vibration Studio software.

8.1 General

It is possible to change one or more setup parameters after taken delivery of a PCH 1216 or PCH

1218 device. For this purpose, please run the PCH Vibration Studio software, which must be

installed on a PC that is connected to an on-site PCH 1216 or PCH 1218 device via its optional

embedded RS485 ModBus interface, via an optional LAN connection using a CHB 1120

EtherBridge, via an optional CHB 1131 Service Cable or an optional CHB 1134 Service Adaptor.

Although many PCH Engineering devices might be visible in the PCH Vibration Studio software

simultaneously, any change of setup parameters can only be carried out for one device at the time.

On the other hand measurement results and status data can be collected sequentially from all PCH

Engineering vibration monitors that are listed under “Devices”.

Some features/functions described in this manual might not be available or have been disabled by

the manufacturer in the device delivered to you prior to delivery. Only those measuring parameters

concerning features/functions that have been installed and enabled can be changed. Depending on

the available hardware, certain features/functions can be implemented in the future, but only at the

location of the manufacturer as a chargeable upgrade. The description of the measuring parameter

setup in this chapter is based on using the PCH Vibration Studio software for this purpose.

If the value of an entered parameter is invalid the field will turn Red and if the mouse cursor is

moved to the red coloured full scale field, a range of valid values will pop up.

Note!

It is strongly recommended to check the integrity of a parameter setup by clicking on

the “Validate!” button before applying the settings to your PCH 1216 or PCH 1218

device.

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8.2 Monitor

In the PCH Vibration Studio software “Edit/Monitor” page it is possible to see those

features/functions that are available for use.

Fields that are marked indicate features that are mounted.

Some features that are not mounted have missing hardware components on the main printed circuit

board of the device. This type of features can never – even by the manufacturer – be enabled after

delivery has taken place.

Alarm Hang Time

The “Alarm Hang Time” is the time an alert or danger alarm remains activated even though the

vibration level has decreased to below the trigger level. The hang time gives a PLC time to react on

short lived alarms. The alarm hang time is set for all alarms at once at a typical default value of: 1

second.

However, the system failure relay (and LED indication) has NO hang time and will remain activated

until the system failure condition has ended.

Overload Hang Time

The “Overload Hang Time” is the time a sensor-overload indication remains activated even though

the overload condition has ended. The hang time gives a PLC time to react on short lived sensoroverload indications. The alarm hang time is set for all sensor overloads at once at a typical default

value of: 1 second.

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8.3 Self-Test

Both the PCH 1216 and PCH 1218 include a “Self-Test” function that can be activated by using –

remote or on-site – the PCH Vibration Studio software with either a RS485, LAN or Service

Cable/Adaptor connection. For more information about Self-Test, please read section 4.9 of this

user manual.

The user/operator will have to specify/set the following in connection with a self-test:

- A certain pre-set scalar value during self-test of the RAW SampleValue for each of the three

(3) pairs of accelerometer transducers

- Whether or not the sensor-overload indicator related to each of the six (6) accelerometer

transducer must be activated during self-test

- The output level of the DC analogue outputs during self-test as a percentage of full scale of DC

current (mA) or DC voltage (V)

- Whether or not the sensor-overload indicator related to each of the two (2) analogue outputs

must be activated during self-test

- A certain pre-set measurement result scalar level for each conditioning band in its own units,

e.g. mm/s2, mm/s or mm

- The state of the Alert and Danger alarms during the self-test (note: During self-test the alarm states

must be specified separately – they are not automatically generated by any preset measurement

results level exceeding an alarm limit)

Please find on the below a complete overview of the values/parameters related to the self-test

procedure of a PCH 1216 or PCH 1218.

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The “Status” LED on a PCH 1216 or PCH 1218 device will will flash Yellow during a self-test.

! Warning:

Before setting the self-test parameters it is strongly recommended to make sure that you

understand the meaning of each parameter and the consequences the value and/or

status of certain parameter(s) will have on your complete installation.

8.4 Setup of general conditioning Bands 1 - 4

A PCH 1216 or PCH 1218 device has five (5) conditioning bands of which four (4) are for general

vibration monitoring use.

The fifth conditioning band is dedicated to the SSD Danger alarm function (only). See section 9.

Transducer:

Choose the transducer(s), i.e. vibration directions, to be monitored. There is a choice of any of the

three vibration vectors A, B or C (SingleDir mode), the sum of any two vibration vectors in one

plane A+B, B+C or A+C (OmniDir mode) or the sum of all three vibration vectors A+B+C

(TriaxDir mode).

The choice “None” will disable the conditioning Band.

Whenever one of the four general conditioning Bands is disabled, the respective vibration

parameter will disappear from the main Result display of the PCH Vibration Studio Software.

The conditioning Band reserved for the SSD Danger alarm function cannot be disabled.

The conditioning band reserved for the SSD function is default set to TriaxDir mode. Any of the

OmniDir modes is also allowed, but SingleDir modes are not part of the SSD function.

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Name:

It is recommended to give each conditioning Band a useful and easy recognizable name.

Measurement Setup

Unit:

Choose a measuring unit for each conditioning Band:

- Acceleration : m/s2,mm/s2, mg or g

- Velocity

: mm/s

- Displacement : mm or μm

Full Scale:

Enter the full scale of your choice. However, there are certain limitations related to the

accelerometer transducer. In case you make an erroneous choice the field will turn red and if your

curser is held over the field you will get information on valid scalar values that can be entered.

Filters:

When clicking on the Filter Range field the following should pop-up:

Before defining the band filter of the conditioning Band it is necessary to choose from two (2) sets

of filter ranges. The “Showing 0.1 to 120 Hz filters” is a set of filters used for wind turbine

structural vibration monitoring. The second “Showing 0.4 to 1 kHz filters” is used to monitor the

vibration of machinery, e.g. the gearbox, generator or bearings.

Now make your choice of band-pass filter within the range just defined. This is done by first

marking a Low Limit Filter (HP-High Pass) on the left side and then an Upper Limit Filter (LP-

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Low Pass) on the right side. After you have made your choice you can leave this frame by clicking

on the “Close” button.

Once you have made your choice of band-pass filter it is possible to obtain a detailed description of

this band-pass filter by clicking on the “Filter Info” button.

Detector:

The four (4) general conditioning bands in a PCH 1216 or PCH 1218 have a choice from four (4)

different detector types:

In general only the detectors RMS, Peak and Peak-to-Peak (P-P) are used. (Default: RMS with an

averaging time of 3 s).

The fourth detector is an (optional) RMS detector with 600 seconds averaging time, which is used

for very special applications only.

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The decision with regard to which detector to choose in each of the four general conditioning Bands

in a PCH 1216 or PCH 1218 device depends on the application of which the device will be a part:

- True RMS detector:

The most common detector is the True RMS detector.

By default the detector for any general conditioning Band will be pre-set to “RMS”

The only additional parameter that will have to be set is the RMS Averaging Time (in seconds).

By default the value of the RMS Averaging Time is pre-set to: 3 seconds.

- Peak detector:

The Peak detector has two additional parameters that will have to be set:

~ Attack Time (in milliseconds):

If nothing is specified the Attack Time will by default be pre-set to 5.0 milliseconds

~ Decay Time (in seconds):

If nothing is specified the Decay Time will by default be pre-set to 2 seconds

- Peak-to-Peak detector:

The Peak-to-Peak detector is setup in exactly the same way as the Peak detector.

Alert Alarm Setup:

It is possible to attach an Alert alarm to the above mentioned detectors that will become active as

soon as a pre-set trigger level has been exceeded for a period of time that is longer than the Alert

delay time. A PCH 1216 or PCH 1218 device has NO alarm relays to inform the safety system of

the wind turbine (or machine) that the monitored vibration level has exceeded the trigger level.

Only with the PCH 1218 it will be possible to check if a certain bit in PDO4 has been toggled from

“0” to “1”.

An Alert alarm can only be set-up if this alarm is “Enabled”:

After the “Enable” field has been marked the following window becomes visible:

Alert Limit:

The alert Limit is the trigger level at which the Alert Alarm indicator in the main Display window

in the PCH Vibration Studio software for that particular condition Band will turn yellow. By default

the Alert Limit is set to 50 % of the full scale.

Alert Delay:

To avoid false alarms because of short pulse like increases in the monitored vibration level it is

recommended to implement a certain delay (minimum) time during which the vibration level must

continuously exceed the Alert alarm trigger level.

By default the Alert Delay time is set to 0 seconds.

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Alert Latched:

Un-latched alarms will turn back to stand-by as soon as the hang time (in seconds), which is the

minimum time an alarm will remain active after the conditions that triggered the alarm, have ended.

Latched alarms will remain active even if after the conditions that triggered the alarm, have ended.

Very serious alarms are usually latched to make sure the operator notices the alarm.

Danger Alarm Setup:

The set-up of a Danger alarm is very much similar to that of an Alert alarm.

There are only a few differences that should be kept in mind:

- The Danger Limit MUST ALWAYS BE AT A HIGHER LEVEL THAN the Alert Limit

- By default the Danger Limit is set to 80 % of the full scale.

- By default the Danger Delay time is set to 5 seconds. This way the Danger alarm will trigger

faster whenever a (sudden) dangerous vibration level is detected.

Note!

Only when specified explicitly in the Customer Specification Agreement the Alert and

Danger alarms in the conditioning bands will be enabled.

8.5 Re-set of Alarms

How alarms are re-set depends on whether these alarms are latched or non-latched.

Non-latched alarms:

An active non-latched Alert or Danger alarm will automatically be cleared when the vibration level

is reduced below its trigger level for a period longer than the hang time of typical 1 second

Latched alarms can only be re-set by clicking on the reset alarm button within the PCH Vibration

Studio software or by carrying out a successful self-test

SSD alarms:

SSD alarms are always latched and very “sticky”. An SSD alarm can – according to the GL2010

guide lines – only be reset on-site by a user/operator carrying out a successful SSD test. Off the

record the SSD alarm in a PCH 1218 device can be reset via the CANopen protocol.

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9 SSD function

A number of wind turbines have been totally damaged by e.g. a failure of one or more of the main

ball bearings in the drive chain of the wind turbine. The very high costs following such a

catastrophic event has made the insurance companies force the wind turbine owners to install a

device that can detect the tremendous shocks that appear during the initial state of the disaster.

A PCH 1216 or PCH 1218 device is provided with an embedded Shock Safety Detection (SSD)

function in order to detect those huge unexpected shocks imposed on the structure of the wind

turbine tower. Other causes of huge vibrations/shocks might be damaged blades, loose main

bearing, loose gearbox or other major events, any of which can create large shock transients that are

able to severely damage the wind turbine on short notice.

9.1 SSD function

The SSD function is a limited configurable function inside a PCH 1216 or PCH 1218 device.

The SSD function is a factory installed function that canNOT be disabled by the user.

The SSD function is certified by Germanischer Lloyd according to their latest guide lines and will

be updated whenever newer versions become available. Whenever the SSD function is included in

the purchase order, the presence of the SSD function is clearly marked on the outside of the monitor

with the following label:

9.2 SSD function configuration

The SSD function will always be pre-configured prior to delivery by the manufacturer PCH

Engineering A/S.

When the SSD function is pre-configured by the factory, the firmware (software embedded in the

vibration monitor) locks the SSD parameters, so they can no longer be altered by the user.

The SSD function is based on two dedicated mechanical relays that will – if connected in series –

form a fully redundant ISO 13849-1:2006 category 3 compliant sub-system. An integrated

diagnostic system monitors the health of the two relays thus ensuring an extremely high level of

functional safety.

During “stand by” the relays are in “make mode” and the contacts at pin #2 and pin #3 are at GND

level, i.e. connected to GND.

When activated the relays toggle to “break mode” and the connection of pin #2 and pin #3 to GND

is interrupted.

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Those PCH 1216 and PVCH 1218 devices that are provided with the “Two String SSD relay

Function” do possess a second pair of dedicated mechanical SSD relays, which behave exactly the

same as the first pair described above.

Warning!

The relays are small highly reliable mechanical relays. Excessive current (and/or

voltage) will destroy a relay. For this reason please do not apply any power source

directly to the relay but protect the relay with a resistor in series that will limit the current.

Please make sure that the following ratings/conditions for the SSD Danger alarm relays

are not exceeded in your application:

- Maximum load voltage

: 48 VDC

- Maximum load current

: 100 mA

- Maximum power

: 5 Watts

The SSD function is pre-configured to work in TriaxDir mode and can by no means be disabled by

the user or operator. Once pre-set, this setting can only be changed by the manufacturer PCH

Engineering A/S. However, it is possible – on user/customer request – to make the SSD function

operable with any one of the three(3) available OmniDir modes. The SSD function will NOT with

one of the SingleDir modes.

All parameters related to the SSD function are factory-set except Full Scale in m/s2 and the SSD

danger alarm trigger level. This can be set by an operator using the PCH Vibration Studio software

to a maximum full scale of 50 m/s2 and a maximum trigger level not exceeding the full scale level.

The filter range is pre-set from 0.1 Hz (Bypass) to 25 Hz (Butterworth Low pass filter) and the

detector type is: Peak. The detector attack time is 5 ms and the decay time is 2 s.

Although the SSD alarm delay time is set to 0 seconds, the time lap between the moment the SSD

Danger alarm trigger level is exceeded until the moment the alarm actually triggers is

approximately 50 ms. The total of 50 ms is within the requirements (<100 ms) by Germanischer

Lloyd.

How to change the SSD Danger alarm parameters is very similar to changing the setup parameters

in a conditioning band. See section 8.4 of this manual for more information on this topic.

9.3 SSD test and re-set of a SSD Danger alarm

According to Germanischer Lloyd a triggered SSD Danger alarm can and must only be reset

manually by a person physically going to the wind turbine nacelle by pressing a SSD test/re-set

button positioned close to the PCH 1216 or PCH 1218 device or on the control panel in the nacelle.

Such a button will connect pin #4 with GND level, which is available at pin #7 for a PCH 1216 or

PCH 1218 device with an 8-pin connector or at pin #12 for a PCH 1216 or PCH 1218 device with a

12-pin connector. Therefore there is no possibility to reset the SSD alarm (remotely) from the PCH

Vibration Studio control software.

Whenever the “SSD test” is activated all processes/components/parts in the SSD measurement

chain are tested, i.e. both accelerometers, conditioning circuit, signal processing and SSD relay

outputs. Activating the “SSD test” will force the SSD relay outputs at pin #2 and pin #3 to become

active – thus performing a simulation of a SSD alarm. Similar simultaneous behaviour will occur at

pin #10 and pin #11 of PCH 1216 and PCH 1218 devices with an embedded two string SSD

function.

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See sections 4.1 and 4.2 for the layout of the connectors that are relevant for your PCH 1216 or

PCH 1218 device.

If any erroneous behaviour of the SSD function that is detected during a “SSD test” will cause a

system error visible indicated by the device LED on the enclosure by showing a continuous red

light.

If the SSD test ends flawless any activated SSD Danger alarm will be de-activated and the

PCH1216/1218 will return to standby mode, which will be indicated by the same device LED on

the enclosure by showing a continuous green light.

An SSD alarm event is saved in non-volatile memory and will therefore be persistent (i.e. sticky)

across power off/on. This means that the monitor will not be reset or in any other way lose the SSD

alarm status or settings in connection with an (un-)intentional power down. Also a loss of

communication will NOT result in a reset of a triggered SSD Danger alarm.

Warning!

The SSD test/re-set is to be carried out by a technician that is personally present in the

wind turbine (nacelle). Since a remote re-set of a SSD Danger alarm is a clear violation

of the Germanische Lloyd GL2010 approval, we strongly advice the users of PCH 1218

devices NOT to use the CANopen protocol to re-set an activated SSD Danger alarm.

Doing so might have serious consequences concerning compensation for damages by

your insurance company. However, if the wind turbine is densely surveyed by means of

cameras (and microphones) that are positioned both inside and outside the wind turbine

thus giving a technician in a remote control room a full overview of the wind turbine’s

operational condition, it is officially allowed to initiate the SSD test from this remote

control room. See the GL2010 certification guide lines, chapter 2.2.2.5 on the subject of

camera surveillance.

In no way can the manufacturer PCH Engineering be made responsible for any damage(s)

or increase of damage(s) caused by a remote re-set of an activated SSD Danger alarm.

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10 Service and maintenance

10.1 Periodic self-test of a PCH 1216 or PCH 1218 device

As described in chapter 11 of the “Guidelines for Certification of Wind turbines, Edition 2010”

published by Germanische Lloyd (GL) in Germany, every wind turbine is subject to Periodic

Monitoring, which is an inspection of the wind turbine by a technical expert at regular intervals.

The inspection shall be carried out according to the conditions in the Certification Reports.

Inspection intervals are laid down in the corresponding Certification Reports, their annexes, or

indirectly in the form of references. The objective of Periodic Monitoring is the examination

(inspection) of the entire wind turbine including the machinery, the safety devices and the structural

integrity. The typical inspection interval for a modern wind turbine is: once every 6 months.

The PCH 1216 and/or PCH 1218 devices are regarded as a safety device in the wind turbine. To

assure a high level of reliability of the PCH 1216 and PCH 1218 device’s safety functions the

device has a built-in watch dog, which constantly monitors possible faults in the circuitry. To

maximize the integrity of the device even further the manufacturer suggests that the vibration

monitor is tested at least at fixed intervals that correspond with the periodic monitoring procedure,

so that the tests are not in conflict with the normal operation of the wind turbine.

A PCH 1216 or PCH 1218 device has two individual “forced” self-test functions, which can be

triggered independently of each other by the technical expert:

- The first forced self-test function is a general self-test function that tests the complete signal

chain for all functions (excluding the SSD Danger alarm function) from the sensors onwards,

including the fieldbus (if implemented and active).

! Note:

It is highly recommended that this self-test function is initiated during start up and at

regular intervals (6 months, see above) under the condition that the actual vibration

level is below a certain low level, i.e. at low wind speed condition only.

For more information on the SSD test function, see chapter 4.9 of this manual.

- The second forced self-test is a special SSD test, which tests the specific signal chain related to

the “Safety Shock Detector” function.

For more information on the SSD test function, see chapter 4.5 of this manual.