Yokogawa PR300 Power and Energy Meter - Manual (Page 43)

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<Toc> <Ind> <3. Procedures for Setting PR300 Functions>
IM 77C01E01-10E
3.5.5 Data Length
[Procedure]
(1) To set the data length, write data to the D register in the table below. The data type is
integer.
(2) After writing that value, write 1 to the RS-485 writing status register, D0277.
D Register
D0275
D0277
Reference No.
40275
40277
H No.
0112
0114
Description
Data length
RS-485 writing status
(D0271 to D0276 are
validated)
Effective Range
0: 8 bits
1: 7 bits
If other than 1: Invalid
If 1: Writing is executed
Initial value of data length: 0 (8 bits)
NOTE
When Modbus/TCP is selected for the protocol, the data length is fixed and unchangeable
at 8 bits.
[Example]
To set the data length to 1 (7 bits):
For station number 01, use PC link communication (without checksum) and the random
write command as shown below:
[Command]
[STX]01010WRW02D0275,0001,D0277,0001[ETX][CR]
[Response]
[STX]0101OK[ETX][CR]