YOKOGAWA UPM100, User Manual

Page: 33 / 104

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IM 77C01H01-10EN
Procedures for Setting UPM100/UPM101 Functions
3
3.4 Other Settings
3.4.7 LAG Reactive Energy Writing
Note
A LAG reactive energy value can be written to the UPM100 with the optional reactive power/
reactive energy measuring function.
[Procedure]
1. Write a LAG reactive 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, D0094.
D Register Reference No. H No. Description Effective Range
D0091 40091 005A
Set LAG reactive energy value
(lower 2 bytes)
Refer to the “Note” below.
D0092 40092 005B
Set LAG reactive energy value
(upper 2 bytes)
D0094 40094 005D
Set reactive energy value
write status
If other than 1: Invalid
If 1: Writing is executed
[Example]
To set the LAG reactive 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] 01010WRW03D0091, 3039, D0092, 0000, D0094, 0001 [ETX] [CR]
[Response]
[STX] 0101OK [ETX] [CR]
Note
The set LAG reactive 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 Mvar 0 to 99999 kvarh
1 Mvar to 10 Mvar 0.00 to 999.999 Mvarh
10 Mvar or above 0.0 to 9999.999 Mvarh
Regardless of the value of [Secondary rated power] x [VT ratio] x [CT ratio], the set LAG
reactive 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 9999999 varh
Note
The secondary rated power of the UPM100 changes depending on its type.