5–104
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
5.13.6 Comm Port Monitor
PATH: SETPOINTS
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S12 489 TESTING
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COMMUNICATION PORT MONITOR
During communications troubleshooting, it can be useful to see the data being transmitted
to the 489 from some master device, as well as the data transmitted back to that master
device. The messages shown here make it possible to view that data. Any of the three
communications ports may be monitored. After the communications buffers are cleared,
any data received from the monitored communications port is stored in Rx1 and Rx2. If the
489 transmits a message, it appears in the Tx1 and Tx2 buffers. In addition to these
buffers, there is a message indicating the status of the last received message.
5.13.7 Factory Service
PATH: SETPOINTS
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S12 489 TESTING
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FACTORY SERVICE
This section is for use by GE Multilin personnel for testing and calibration purposes.
COMMUNICATION
[
Z
]
MONITOR COMM. PORT:
Computer RS485
Range: Computer RS485, Auxiliary
RS485, Front Panel RS232
MESSAGE
CLEAR COMM.
BUFFERS: No
Range: No, Yes
MESSAGE
LAST Rx BUFFER:
Received OK
Range: Buffer Cleared, Received OK,
Wrong Slave Addr., Illegal
Function, Illegal Count, Illegal
Reg. Addr., CRC Error, Illegal
Data
MESSAGE
Rx1: 02,03,00,67,00,
03,B4,27
Range: received data in HEX
MESSAGE
Rx2:
Range: received data in HEX
MESSAGE
Tx1: 02,03,06,00,64,
00,0A,00,0F
Range: transmit data in HEX
MESSAGE
Tx2:
Range: transmit data in HEX
FACTORY
[
Z
]
ENTER FACTORY
PASSCODE: 0
Range: N/A