Siemens 200 instruction manual Decimal Offset Example, Format

The decimal offset indicates how the remote system must interpret the integer value that is stored in the parameter access register. The following table shows how different parameter values can be shown based on a register value (integer) of 1234.

Decimal	Offset	Example
0	0	1,234
1	–1	12,340
2	–2	123,400
3	–3	1,234,000
4	–4	12,340,000
5	–5	123,400,000
6	+1	123.4
7	+2	12.34
8	+3	1.234
9	Percent	12.34%

Examples of using the format word for both the index values and the decimal offset value are shown below:

Format	Primary Index	Secondary Index	Decimal
00000	00	00	0
01003	01	00	3 right
02038	02	03	3 left
05159	05	15	percent

To write these values you can use a decimal offset as follows: format word = (primary index x 1000) + (secondary index x 10) + (decimal).

Modbus Register Types

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