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CGCOMMUNICATIONS GUIDE PROFIBUS-DP COMMUNICATIONS

369 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE CG15

2.5 369 Relay Profibus-DP Loss Of Communication Trip

If the 369 detects a problem in communicating with the Profibus master, the Profibus Loss

of Communications feature can be used to trip any combination of output relays.

During parameterization, a Profibus master sets up the communication and monitoring

times for the slave including the watchdog time. A Profibus slave uses a watchdog timer to

enable it to detect bus inactivity with its master. The watchdog timer is reset every time an

error free message is received from the master. If no valid message is received within the

time specified during parameterization, the slave assumes a communication error.

If the 369 Profibus communications is offline and not communicating with a master, then

the “Profibus Loss of Comms” function (if enabled) will activate. This feature can be

programmed for Latched or Unlatched operation.

If programmed as Latched:

The “Profibus Loss of Comms” trip will remain latched until the communication with the

Master is (re) established AND the latched trip is manually reset or remotely reset via

Modbus communications.

182 30 RemoteRTD3Rtd7Alarm

183 30 RemoteRTD3Rtd8Alarm

184 31 RemoteRTD3Rtd9Alarm

185 31 RemoteRTD3Rtd10Alarm

186 31 RemoteRTD3Rtd11Alarm

187 31 RemoteRTD3Rtd12Alarm

188 31 RemoteRTD4Rtd1Alarm

189 31 RemoteRTD4Rtd2Alarm

190 31 RemoteRTD4Rtd3Alarm

191 31 RemoteRTD4Rtd4Alarm

192 32 RemoteRTD4Rtd5Alarm

193 32 RemoteRTD4Rtd6Alarm

194 32 RemoteRTD4Rtd7Alarm

195 32 RemoteRTD4Rtd8Alarm

196 32 RemoteRTD4Rtd9Alarm

197 32 RemoteRTD4Rtd10Alarm

198 32 RemoteRTD4Rtd11Alarm

199 32 RemoteRTD4Rtd12Alarm

Table CG–3: Profibus Diagnostics (Sheet 7 of 7)

BIT BYTE FUNCTION

GE 369 User Manual

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