YOKOGAWA UPM100, Руководство пользователя

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3-2
IM 77C01H01-10EN
3.1 Basic Setting
3.1.1 Setting of VT Ratio
[Procedure]
1. Write a VT ratio to the two D registers in the table below. The data type is 4-byte floating
point.
2. After writing that value, write “1” to the setting change status register, D0072.
D Register Reference No. H No. Description Effective Range
D0043 40043 002A VT ratio (float, lower 2 bytes)
1 to 6000
D0044 40044 002B VT ratio (float, upper 2 bytes)
D0072 40072 0047 Setting change status
If other than 1: Invalid
If 1: Writing is executed
Default VT ratio: 1 (4-byte floating-point data: 3F800000)
[Example]
To set the VT ratio to 10.0:
For station number 01, use PC link communication (without checksum) and the random write
command as shown below:
If 10.0 is converted into a 4-byte floating-point value, the value is 4120 0000.
[Command]
[STX] 01010WRW03D0043, 0000, D0044, 4120, D0072, 0001 [ETX] [CR]
[Response]
[STX] 0101OK [ETX] [CR]
Note
• When the VT ratio is changed, already integrated values of active energy, reactive energy,
apparent energy, optional electric energy, and regenerative energy will return to 0.
• Set the VT and CT ratios so that [Secondary rated power] x [VT ratio] x [CT ratio] is smaller than
10 GW.