Siemens HydroRanger 200 Instruction Manual download pdf (Page 113)

7ML19981FCO1 HydroRanger 200 – INSTRUCTION MANUAL Page 99

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Modbus Register Types

Global Index Method (P782 = 0)

Only the final digit of the format word determines the decimal offset (below).

Parameter-Specific Index Method (P782 = 1)

All three decimal fields are used to determine the parameter value’s primary index,

secondary index, and decimal offset.

Format Registers

Each format register is made up of three decimal fields:

• decimal offset

• secondary index

• primary index

The primary and secondary indices correspond to those that are used by the parameter.

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

00 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%

primary index (00-64)

secondary index (00-99)

decimal offset (0-9)

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 255 256

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Siemens HydroRanger 200 Instruction Manual Page 113