Modbus Holding Registers; Process Data - Siemens SITRANS F 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 maximum value of a writable "holding register" value can be read by adding 20000 to
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 MODBUS
register address
4:03003 3002
4:03015 3014
4:03019 3018
4:03023 3022
4:03025 3024
Modbus RTU RS485
Operating Instructions, 06/2010, A5E00753974-04
Modbus Holding Registers Memory Map
the address of the value.
the address of the value.
No. of bytes Data type
4
8
8
4
4
Description
Float Absolute Volumeflow (m3/s)
Double Totalizer 1 (m3)
Double 8 Totalizer 2/Batch (m3)
Float Totalizer 1 (m3)
Float Totalizer 2/Batch (m3)
A
Read / write
R
R
R
R
R
37