Table 5-1 Basic Measurements
Notes:
1) The FP Counter and Comm. Counter will be incremented every time some important setup
parameters, which may affect the accuracy of Energy registers and DI Pulse Counters or the way
they are calculated, are changed via Front Panel or Communication, respectively. The FP
Counter is incremented every time a relevant setup parameter is changed via the Front Panel,
while the Comm. Counter is incremented every time a single packet is sent to change one or
more relevant setup parameters through communications. The following actions may trigger
these counters to increment:
Changing Setup Parameters:
o Wiring Mode, PT and CT ratios and I Polarities
o DI setup parameters
o Energy Pulse Constant
o Preset Energy Value
o Demand Period and No. of Sliding Windows
o TOU setup registers
o Manual Time Set (via Front Panel only)
Clear Actions via Front Panel:
o Clear All Energy
o Clear All Demand
o Clear All Max./Min.
o Clear All DI Counters
Clear Actions via Communication:
o Clear Monthly Energy Log (Register 9600)
o Clear Energy (Register 9601)
o Clear Monthly Energy Log of Present Month (Register 9602)
o Clear Peak Demand Log of This Month (Register 9603)
o Clear All Demand Registers and Logs (Register 9604)
o Clear Device Operating Time (Register 9607)
o Clear All Data (Register 9608)
o Clear DI1 Counter (Register 9609) (only when DI1 = Energy Pulse Counter)
o Clear DI2 Counter (Register 9610) (only when DI2 = Energy Pulse Counter)
o Clear DI3 Counter (Register 9611) (only when DI3 = Energy Pulse Counter)
2) The PMC-340 has one SOE Log and one 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 DR 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 the SOE Log Pointer or DR Log Pointer
and Log Depth is as follows:
SOE Log Depth = 16 (fixed)
DR Log Depth = DR Recording Depth (see Section 5.11 Data Recorder Setup)
3) For the DI Status register, the bit values of B0 to B2 represent the states of DI1 to DI3,
respectively, with “1” meaning active (closed) and “0” meaning inactive (open).
4) The following table illustrates the Wiring Diagnostic Status with 0 meaning Normal and 1 meaning
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