CET Electric Technology
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6) The PMC-33M-A has one SOE Log. The log 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 does not contain any Log. If a Clear Log is performed via communications,
its 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.
Use the following equation to determine the latest log location:
Latest Log Location = Modulo [SOE Log Pointer / SOE Log Depth (fixed at 100)]
7) The Device Operating Time means the accumulated Operating Time whenever any per-phase
Current exceeds 2% of I
nominal
(5A), which is 100mA. 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) 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. When the Wiring Mode is 1P3W, the L3 phase
voltages and currents have no meaning, and their registers are reserved.
9) When the Wiring Mode is 1P2W L-N, 1P2W L-L or 1P3W, the 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 0.01 times of the register value.
5.2.1 3-Phase Total Energy Measurements
Table 5-4 3-phase Total Energy Measurements
5.2.2 Phase A (L1) Energy Measurements
Table 5-5 Phase A Energy Measurements
5.2.3 Phase B (L2) Energy Measurements
When the Wiring Mode is 1P2W L-N or 1P2W L-L, the L2 phase energy measurements have no meaning,
and the following registers are reserved.
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