GE PQMII Instruction Manual

Contents

3–2 PQMII POWER QUALITY METER – INSTRUCTION MANUALCHAPTER 3: OPERATION3.2 LED Indicators3.2.1 DescriptionThe 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 PQMIIis in simulation mode, or if there is a problem with the PQMII itself.FIGURE 3–2: LED Indicators3.2.2 Status• 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 usingsimulated values for current, voltage, analog input, switches and analog outputs.While in simulation mode, the PQMII will ignore the measured parametersdetected at its inputs and will use the simulated values stored in the S5 TESTING ÖØSIMULATION setpoints group.• Self-Test: Any abnormal condition detected during PQMII self-monitoring, such asa hardware failure, causes the Self Test LED indicator to be on. Loss of controlpower to the PQMII also causes the Self Test LED indicator to turn on, indicatingthat no metering is present.3.2.3 CommunicateThe 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 RX1/2LED indicators are off. This situation occurs if there is no connection, the serial wiresbecome disconnected, or the master computer is inactive. If there is activity on the serialport 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 messageformats (such as baud rate or framing), reversed polarity of the two RS485 twisted-pairconnections, or the master not sending the currently programmed PQMII address. If thePQMII is being periodically addressed with a valid message, the RX1/2 LED indicator willturn on followed by the TX1/2 LED indicator.• TX1: The PQMII is transmitting information via the COM1 RS485 communicationsport when lit.• RX1: The PQMII is receiving information via the COM1 RS485 communications portwhen lit.