Modbus Holding Registers; Process Data - Siemens SITRANS F Modbus RTU RS 485 Operating Instructions Manual

Modbus holding registers

In the following the holding registers for the USM II Modbus RTU module are described.
Figure A-1
• The minimum value of a writable "holding register" value can be read by adding 10000 to the
address of the value.
• The maximum value of a writable "holding register" value can be read by adding 20000 to the
address of the value.
If the value is not directly applicable, the min./max. limit shown will be based on the data type
- e.g. a "WORD-type" value will show the limits 0-65535 - even though some of these values are
not allowed.
Note
Min./max. values do not apply to all datatypes (e.g. strings). Reading min./max. value for such
"holding registers" will return zero-values.
A.1

Process data

Table A-1 Process data, MAG 6000
MODBUS regis‐ MODBUS ad‐
ter dress
4:03003 3002
4:03015 3014
4:03019 3018
Modbus RTU RS 485
Operating Instructions, 03/2021, A5E00753974-AB
Modbus Holding Registers Memory Map
No. of bytes Data type
4 Float
8 Double
8 Double
Description
Absolute Volumeflow (customer unit
Totalizer 1 (customer unit
2)
Totalizer 2/Batch (customer unit
A
Read / write
1) ) R
) R
) R
3)
37