YOKOGAWA PR300, User Manual

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<Toc> <Ind> <3. Procedures for Setting PR300 Functions>
IM 77C01E01-10E
3.6.5 Apparent Energy
[Procedure]
(1) Write an apparent 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 writing status register, D0384.
D Register
D0382
Reference No.
40382
H No.
017D
Description
Apparent energy-setpoint
(lower 2 bytes)
Effective Range
Refer to the "NOTE" below.
D0383 40383 017E
Apparent energy-setpoint
(upper 2 bytes)
D0384 40384 017F
Apparent energy writing status If other than 1: Invalid
If 1: Writing is executed
[Example]
To set the apparent energy value to 10,000,000 kVAh:
For station number 01, use PC link communication (without checksum) and the random
write command as shown below:
If 10,000,000 is converted into a hexadecimal value, the value is 0098 9680. Then the
order of the upper two bytes and the lower two bytes is reversed
⇒
9680 0098.
[Command]
[STX] 01010WRW03D0382, 9680, D0383, 0098, D0384, 0001 [ETX] [CR]
[Response]
[STX] 0101OK [ETX] [CR]
NOTE
The set apparent energy value range of the PR300 changes depending on the values of
the VT and CT ratios. The table below shows the set value range.
[Secondary Rated Power] [VT Ratio] [CT Ratio]
Less than 100 kW
100 kW to less than 1 MW
1 MW to less than 10 MW
10 MW or greater
Possible Set Value Range
0 to 99999 kVAh
0 to 999999 kVAh
0 to 9999999 kVAh
0 to 99999999 kVAh
NOTE
The secondary rated power of the PR300 changes depending on its model and suffix
codes.