YOKOGAWA UPM100, User Manual

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3-16
IM 77C01H01-10EN
3.4 Other Settings
3.4.4 Active Energy Writing
[Procedure]
1. Write an active energy value to the two D registers in the table below. The data type is
integer.
2. After writing that value, write “1” to the write status register, D0073.
D Register Reference No. H No. Description Effective Range
D0057 40057 0038
Set active energy value
(lower 2 bytes)
Refer to the "Note" below.
D0058 40058 0039
Set active energy value
(upper 2 bytes)
D0073 40073 0048
Set active energy value write
status
If other than 1: Invalid
If 1: Writing is executed
[Example]
To set the active energy value to 12345:
For station number 01, use PC link communication (without checksum) and the random write
command as shown below:
If 12345 is converted into a hexadecimal value, the value is 0000 3039. Then the order of
the upper two bytes and the lower two bytes is reversed → 3039 0000.
[Command]
[STX] 01010WRW03D0057, 3039, D0058, 0000, D0073, 0001 [ETX] [CR]
[Response]
[STX] 0101OK [ETX] [CR]
Note
The set active energy value range of the UPM100 with the integral resolution (kWh) option changes
depending on the values of the VT and CT ratios. The table below shows the set value range.
[Secondary Rated Power] x [VT Ratio] x [CT Ratio] Possible Set Value Range
Below 1 MW 0 to 999999 kWh
1 MW to 10 MW 0.00 to 9999.999 MWh
10 MW or above 0.0 to 99999.999 MWh
Regardless of the value of [Secondary rated power] x [VT ratio] x [CT ratio], the set active
energy value range of the UPM100 with the integral resolution (Wh) option can be set within
the range below:
Possible set value range: 0 to 99999999 Wh
Note
The secondary rated power of the UPM100 changes depending on its model and suffix codes.