CET Electric Technology
51
Summary Bit (Set if any other bit is set)
Frequency is out of range (45 to 65Hz) (3P4W or 3P3W)
Any phase voltage < 10% of PT Primary (Register 6000) (3P4W only)
Any phase current < 10% of CT Primary (Register 6004) (3P4W or 3P3W)
RTD 1 broken (RTD Input option only)
RTD 2 broken (RTD Input option only)
Voltage Phase Reversal (3P4W only)
Current Phase Reversal (3P4W or 3P3W)
Negative kW Total may be abnormal (3P4W or 3P3W)
Negative kWa is may be abnormal (3P4W only)
Negative kWb may be abnormal (3P4W only)
Negative kWc may be abnormal (3P4W only)
CTa polarity may be reversed (3P4W only)
CTb polarity may be reversed (3P4W only)
CTc polarity may be reversed (3P4W only)
Table 5-3 Wiring Diagnostic Status Register
6) The range of the Log Pointers (SOE and DRx) is between 0 and 0xFFFFFFFFH. The Log Pointer is
incremented by one for every new log generated and will roll over to 0 if its current value is
0xFFFFFFFFH. If a Clear SOE Log or Clear DRx Log is performed from the front panel or via
communications, the corresponding Log Pointer will be reset to zero. Therefore, any 3rd party
software should assume that a Clear Log action has been performed if it sees the SOE Log Pointer
rolling over to zero or to a value that is smaller than its own pointer.
7) The Device Operating Time means the accumulated running time whenever any per-phase Current
exceeds the Current Threshold of the Device Operating Time (Register #6049). The Device
Operating Time data is stored in non-volatile memory and will not suffer any loss in the event of a
power failure.
8) The PMC-53A has one SOE Log and five DR Logs. Each of these logs has a Log Pointer that indicates
its current logging position. The range of the Log Pointer is between 0 and 0xFFFFFFFF, and it is
incremented by one for every new log generated and will roll over to 0 if its current value is
0xFFFFFFFF. A value of zero indicates that the SOE or DRx does not contain any Log. If a Clear Log is
performed via communications, its Log Pointer will be reset to zero.
Use the following equation to determine the latest log location:
Latest Log Location = Modulo [Log Pointer / Log Depth]
where Log Pointer may be one of the following:
SOE Log Pointer, DR1 – DR5 Log Pointers
and Log Depth is as follows:
SOE Log Depth = 100 (fixed)
DRx Log Depth = DRx Recording Depth (see Section 5.11.5 Data Recorder Setup)
9) When the Wiring Mode is 1P2W L-N or 1P2W L-L, the L2 and L3 phase voltages and currents have
no meaning, and their registers are reserved.
10) When the Wiring Mode is 1P2W L-N, 1P2W L-L or 1P3W, the Sequence Components U1/I1, U2/I2
and U0/I0 have no meaning and their registers are reserved.
5.2 Energy Measurements
The Energy registers have a maximum value of 1,000,000,000 and will roll over to zero
automatically when it is reached. The actual energy value is 0.1 times of the register value.
5.2.1 3-Phase Total Energy Measurements