Modbus Map - YOKOGAWA DO71 Manual

2. MODBUS map

Data type for Optical Dissolved Oxygen sensor MODBUS map:
Data type
Float
Uint32
ASCII
Access (load/import) to multiple data types, such as Float, Uint32, ASCII etc., must be
implemented at once. The current version does not support Script yet.
Data Access
Hold Registers are Read only (R) or Read/Write (R/W).
NOTE
The content of this Modbus Map is based upon DO71 firmware YPA 1.4.0.xx and DO72 firmware
YPA 1.4.0.xx
All Rights Reserved. Copyright © 2022, Yokogawa Process Analyzers Europe B.V.
MODBUS Communication – MODBUS map
Definition
floating point (4byte, little endian byte swap [CDAB])
IEEE754
NaN: 0x7FFFFFFF
32 bit unsigned integer, little endian byte swap [CDAB]
character set (using one byte per character), multiple registration possible,
little endian byte swap [CDAB])
Access
16 bits
Function
Read Hold Registers
Write Single Register
Write Multiple Register
8
Function Code (hex)
03
06
10
TI 12J06J01-00EN-P