Yokogawa PR300 Power and Energy Meter - Manual (Page 36)

<Toc> <Ind> <3. Procedures for Setting PR300 Functions>
3-13
IM 77C01E01-10E
3.4.4 Demand Power Alarm Point
[Procedure]
(1) Write a demand power alarm point value 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 demand measurement writing status register,
D0226.
D Register
D0221
D0226
Reference No.
40221
40226
H No.
00DC
00E1
Description
Demand power alarm point
(float, lower 2 bytes)
Demand measurement writing
status (D0218 to D0225 are
validated)
Effective Range
1 to 1000
Unit: kW
D0222 40222 00DD
Demand power alarm point
(float, upper 2 bytes)
If other than 1: Invalid
If 1: Writing is executed
Initial value of demand power alarm point: 100 kW
[Example]
To set the demand power alarm point to 10.0 kW:
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]01010WRW03D0221,0000,D0222,4120,D0226,0001[ETX][CR]
[Response]
[STX]0101OK[ETX][CR]
NOTE
A demand power alarm point value can be set for the PR300 with demand measuring
function.