Status Indicators; Description; Status; Communicate - GE Power Quality Meter Series Instruction Manual

3.2 STATUS INDICATORS

3.2 STATUS INDICATORS
The status indicators provide a quick indication of the overall status of the PQM. These indicators illuminate if
an alarm is present, if setpoint access is enabled, if the PQM is in simulation mode, or if there is a problem with
the PQM itself.
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• ALARM: When an alarm condition exists, the ALARM indicator will be on.
• PROGRAM: The PROGRAM indicator will be on when setpoint access is enabled.
• SIMULATION: The SIMULATION indicator will be on when the PQM is using simulated values for current,
voltage, analog input, switches and analog outputs. While in simulation mode, the PQM will ignore the
measured parameters detected at its inputs and will use the simulated values stored in the
S5 TESTING \ SIMULATION setpoints group.
• SELF TEST: Any abnormal condition detected during PQM self-monitoring, such as a hardware failure,
causes the SELF TEST indicator to be on. Loss of control power to the PQM also causes the SELF TEST
indicator to turn on, indicating that no metering is present.
The COMMUNICATE indicators monitor the status of the RS485 communication ports. When no serial data is
being received through the rear serial ports terminals, the RX1/2 indicators are off. This situation occurs if there
is no connection, the serial wires become disconnected, or the master computer is inactive. If there is activity
on the serial port but the PQM is not receiving valid messages for its internally programmed address, the TX1/
2 indicators remain off. This condition can be caused by incorrect message formats (such as baud rate or fram-
ing), reversed polarity of the two RS485 twisted-pair connections, or the master not sending the currently pro-
grammed PQM address. If the PQM is being periodically addressed with a valid message, the RX1/2 indicator
will turn on followed by the TX1/2 indicator.
• TX1: The PQM is transmitting information via the COM1 RS485 communications port when lit.
• RX1: The PQM is receiving information via the COM1 RS485 communications port when lit.
• TX2: The PQM is transmitting information via the COM2 RS485 communications port when lit.
• RX2: The PQM is receiving information via the COM2 RS485 communications port when lit.
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Figure 3–3: STATUS INDICATORS
PQM Power Quality Meter
3 OPERATION

3.2.1 DESCRIPTION

3.2.2 STATUS

3.2.3 COMMUNICATE

GE Power Management