Led Indicators; Description; Status; Communicate - GE PQMII Instruction Manual

3.2

LED Indicators

3.2.1

Description

3.2.2

Status

3.2.3

Communicate

3–2
The LED status indicators provide a quick indication of the overall status of the PQMII.
These indicators illuminate if an alarm is present, if setpoint access is enabled, if the PQMII
is in simulation mode, or if there is a problem with the PQMII itself.
• Alarm: When an alarm condition exists, the Alarm LED indicator will flash.
• Program: The Program LED indicator is on when setpoint access is enabled.
• Simulation: The Simulation LED indicator will be on when the PQMII is using
simulated values for current, voltage, analog input, switches and analog outputs.
While in simulation mode, the PQMII will ignore the measured parameters
detected at its inputs and will use the simulated values stored in the
setpoints group.
SIMULATION
• Self-Test: Any abnormal condition detected during PQMII self-monitoring, such as
a hardware failure, causes the Self Test LED indicator to be on. Loss of control
power to the PQMII also causes the Self Test LED indicator to turn on, indicating
that no metering is present.
The Communicate LED 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
LED 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 PQMII is not receiving valid messages for its internally programmed address,
the TX1/2 LED indicators remain off. This condition can be caused by incorrect message
formats (such as baud rate or framing), reversed polarity of the two RS485 twisted-pair
connections, or the master not sending the currently programmed PQMII address. If the
PQMII is being periodically addressed with a valid message, the RX1/2 LED indicator will
turn on followed by the TX1/2 LED indicator.
• TX1: The PQMII is transmitting information via the COM1 RS485 communications
port when lit.
• RX1: The PQMII is receiving information via the COM1 RS485 communications port
when lit.
FIGURE 3–2: LED Indicators
PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 3: OPERATION
S5 TESTING