4-76 489 Generator Management Relay
GE Power Management
4.13 489 TESTING 4 SETPOINT PROGRAMMING
4
4.13.5 TEST ANALOG OUTPUT
These setpoints may be used during startup or testing to verify that the analog outputs are functioning correctly. The analog
outputs can be forced only if the generator is offline, no current is measured, and there are no trips or alarms active. When
the
FORCE ANALOG OUTPUTS FUNCTION
is "Enabled", the output reflects the forced value as a percentage of the range
4 to 20 mA or 0 to 1 mA. Selecting "Disabled" places all four analog output channels back in service, reflecting their pro-
grammed parameters. If the 489 measures current or control power is cycled, the force analog output function is automati-
cally disabled and all analog outputs will revert back to their normal state.
Any time the analog outputs are forced, the In Service indicator will flash, indicating that the 489 is not in protection mode.
4.13.6 COMM 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.
4.13.7 FACTORY SERVICE
This section is for use by GE Power Management personnel for testing and calibration purposes.
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TEST ANALOG OUTPUT
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[ENTER] for more
FORCE ANALOG OUTPUTS
FUNCTION: Disabled
Range: Enabled, Disabled
ANALOG OUTPUT 1
FORCED VALUE: 0%
Range: 0 to 100% in steps of 1
ANALOG OUTPUT 2
FORCED VALUE: 0%
Range: 0 to 100% in steps of 1
ANALOG OUTPUT 3
FORCED VALUE: 0%
Range: 0 to 100% in steps of 1
ANALOG OUTPUT 4
FORCED VALUE: 0%
Range: 0 to 100% in steps of 1
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COMM PORT MONITOR
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[ENTER] for more
MONITOR COMM. PORT:
Computer RS485
Range: Computer RS485, Auxiliary RS485,
Front Panel RS232
CLEAR COMM.
BUFFERS: No
Range: No, Yes
LAST Rx BUFFER:
Received OK
Range: Buffer Cleared, Received OK, Wrong Slave Addr.,
Illegal Function, Illegal Count, Illegal Reg. Addr.,
CRC Error, Illegal Data
Rx1: 02,03,00,67,00,
03,B4,27
Range: received data in HEX
Rx2:
Range: received data in HEX
Tx1: 02,03,06,00,64,
00,0A,00,0F
Range: received data in HEX
Tx2:
Range: received data in HEX
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FACTORY SERVICE
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[ENTER] for more
ENTER FACTORY
PASSCODE: 0
Range: N/A
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