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Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module User Manual

Page 100

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MicroLogix 1500 Example Ladder Programs

The format of the command data is:

The Logic Status/Feedback read message instruction on rung 0002 is
configured as follows:

The format of the command data is:

The format of the response data is:

Data Word

Example Value

Description

N7:100

15

PowerFlex 70 node address

N7:101

16

Function Code – Write Multiple Registers

N7:102

0

Starting Register Address (40001)

N7:103

3

Number of registers to write

N7:104

18

Value for 40001 – Logic Command word

N7:105

0

Value for 40002 – not used

N7:106

8192

Value for 40003 – Reference word

Data Word

Example Value

Description

N7:110

15

PowerFlex 70 node address

N7:111

4

Function Code – Read Input Registers

N7:112

0

Starting Register Address (30001)

N7:113

3

Number of registers to read

Data Word

Example Value

Description

N7:114

3855

Value for 30001 – Logic Status word

N7:115

0

Value for 30002 – not used

N7:116

8192

Value for 30003 – Feedback word