Test Analog Output; Comm Port Monitor; Factory Service - GE 489 Instruction Manual

4.13 489 TESTING
T

TEST ANALOG OUTPUT

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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
4 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.
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COMM PORT MONITOR

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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.
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FACTORY SERVICE

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This section is for use by GE Power Management personnel for testing and calibration purposes.
4-76
ð
FORCE ANALOG OUTPUTS
ENTER
FUNCTION: Disabled
ESCAPE
ANALOG OUTPUT 1
ESCAPE
FORCED VALUE: 0%
MESSAGE
ANALOG OUTPUT 2
ESCAPE
FORCED VALUE: 0%
MESSAGE
ANALOG OUTPUT 3
ESCAPE
FORCED VALUE: 0%
MESSAGE
ANALOG OUTPUT 4
ESCAPE
FORCED VALUE: 0%
MESSAGE
is "Enabled", the output reflects the forced value as a percentage of the range
ð
MONITOR COMM. PORT:
ENTER
Computer RS485
ESCAPE
CLEAR COMM.
ESCAPE
BUFFERS: No
MESSAGE
LAST Rx BUFFER:
ESCAPE
Received OK
MESSAGE
Rx1: 02,03,00,67,00,
ESCAPE
03,B4,27
MESSAGE
Rx2:
ESCAPE
MESSAGE
Tx1: 02,03,06,00,64,
ESCAPE
00,0A,00,0F
MESSAGE
Tx2:
ESCAPE
MESSAGE
ð
ENTER FACTORY
ENTER
PASSCODE: 0
ESCAPE
489 Generator Management Relay
4 SETPOINT PROGRAMMING
4.13.5 TEST ANALOG OUTPUT
Range: Enabled, Disabled
Range: 0 to 100% in steps of 1
Range: 0 to 100% in steps of 1
Range: 0 to 100% in steps of 1
Range: 0 to 100% in steps of 1
4.13.6 COMM PORT MONITOR
Range: Computer RS485, Auxiliary RS485,
Front Panel RS232
Range: No, Yes
Range: Buffer Cleared, Received OK, Wrong Slave Addr.,
Illegal Function, Illegal Count, Illegal Reg. Addr.,
CRC Error, Illegal Data
Range: received data in HEX
Range: received data in HEX
Range: received data in HEX
Range: received data in HEX
4.13.7 FACTORY SERVICE
Range: N/A
GE Power Management