CET iMeter 6, User Manual

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CET Electric Technology
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5) The range of the SOE/PQ/WFR/IER/DR Log Pointer is between 0 and 0xFFFFFFFFH. The pointer is incremented for every new log
generated and will roll over to 0 if its current value is 0xFFFFFFFFH. A value of zero indicates that the specific Log does not contain any
record. If a Clear SOE Log/PQ Log/WFR Log/IER Log/DR Log is performed from the Front Panel/Web Interface or via communications,
its corresponding 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 Depth = 512 for SOE Log and PQ Log , 128 for WFR Log , IER Recording Depth for IER Log and DR Recording Depth for DR
Log .
6) The Device Operating Time means the accumulated Operating Time (or Running Hours) whenever any per-phase Current has
exceeded the Current on Threshold (Register 6200). The Device Operating Time data is stored in non- volatile memory and will not
suffer any loss in the event of a power failure.
5.2 Energy Measurements
5.2.1 Total 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 iMeter 6 also provides energy measurements in fractional values if they are required. Using the
“Fractional” registers, having units such as W

sec, var

sec and VA

sec, the user can obtain decimal resolution for
achieving higher accuracy. For example, if the value of the kWh fractional register is 3200000 W

sec, the decimal
value is 3200000/3600000=0.8889kWh. If the higher resolution is not required, it is not necessary to read the
fractional energy registers.
Register Property Description Format Scale Unit
0200 RW kWh Import UINT32
x1 kWh
0202 RW kWh Export UINT32
0204 RO kWh Net INT32
0206 RO kWh Total UINT32
0208 RW kvarh Import UINT32
x1 kvarh
0210 RW kvarh Export UINT32
0212 RO kvarh Net INT32
0214 RO kvarh Total UINT32
0216 RW kVAh UINT32 x1 kVAh
0218 RW kvarh Q1 UINT32
x1 kvarh
0220 RW kvarh Q2 UINT32
0222 RW kvarh Q3 UINT32
0224 RW kvarh Q4 UINT32
0226 RO kWh Import Fractional Float
x1 W

s
0228 RO kWh Export Fractional Float
0230 RO kWh Net Fractional Float
0232 RO kWh Total Fractional Float
0234 RO kvarh Import Fractional Float
x1 var

s
0236 RO kvarh Export Fractional Float
0238 RO kvarh Net Fractional Float
0240 RO kvarh Total Fractional Float
0242 RO kVAh Fractional Float x1 VA

s
0244 RO kvarh Q1 Fractional Float
x1 var

s
0246 RO kvarh Q2 Fractional Float
0248 RO kvarh Q3 Fractional Float
0250 RO kvarh Q4 Fractional Float
Table 5-3 Energy Measurements
5.2.2 Phase A Energy Measurements
Register Property Description Format Scale Unit
4600 RW kWh Import UINT32
x1 kWh
4602 RW kWh Export UINT32
4604 RW kWh Net INT32
4606 RW kWh Total UINT32
4608 RW kvarh Import UINT32
x1 kvarh
4610 RW kvarh Export UINT32
4612 RW kvarh Net INT32
4614 RW kvarh Total UINT32
4616 RW kVAh UINT32 x1 kVAh
4618 RW kvarh Q1 UINT32
x1 kvarh
4620 RW kvarh Q2 UINT32
4622 RW kvarh Q3 UINT32
4624 RW kvarh Q4 UINT32
4626 RW kWh Import Fractional Float
x1 W

s 4628 RW kWh Export Fractional Float
4630 RW kWh Net Fractional Float