Yokogawa PR300 Power and Energy Meter - Manual (Page 32)

<Toc> <Ind> <3. Procedures for Setting PR300 Functions>
3-9
IM 77C01E01-10E
3.3.2 Upper/Lower Limits of Scaling
[Procedure]
(1) Write upper/lower limits of scaling value to the four D registers in the table below. The
data type is 4-byte floating point.
(2) After writing that value, write 1 to the analog output writing status register, D0217.
D Register
D0213
D0217
Reference No.
40213
40217
H No.
00D4
00D8
Description
Lower limit of scaling
(float, lower 2 bytes)
D0214 40214 00D5
Lower limit of scaling
(float, upper 2 bytes)
Analog output writing status
(D0212 to D0216 are
validated)
Effective Range
0.0 to 50.0
Unit: %
D0215 40215 00D6
Upper limit of scaling
(float, lower 2 bytes)
D0216 40216 00D7
Upper limit of scaling
(float, upper 2 bytes)
50.0 to 100.0
Unit: %
If other than 1: Invalid
If 1: Writing is executed
Initial value of lower limit of scaling: 50%
Initial value of upper limit of scaling: 100%
[Example]
To set the lower limit of scaling 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] 01010WRW03D0213, 0000, D0214, 4120, D0217,0001 [ETX] [CR]
[Response]
[STX] 0101OK [ETX] [CR]
NOTE
• An upper/lower limit of scaling value can be set for the PR300 with analog output.
• Set an upper/lower limit of scaling so that [upper limit of scaling] – [lower limit of
scaling] is 50% or greater. If it is smaller than 50%, writing to the D register will be
invalid.