Rockwell Automation 440R MSR300 Modular Safety Control System - Manual (Page 70)

MSR300 Safety System Manual
Rockwell Automation
MSR300 Manual.doc Pg 70 of 85
Read Multiple Registers (0x03)
Query:
Fieldname
Example
Slave Address 0x01
Function Code 0x03
Start Address (High byte) 0x00
Start Address (Low byte) 0x02
Number of registers (High byte) 0x00
Number of registers (Low byte) 0x02
CRC (High byte) 0x65
CRC (Low byte) 0xCB
Response:
Fieldname
Example
Slave Address 0x01
Function Code 0x03
Byte Count 0x04
Data (High byte) 0x1F
Data (Low byte) 0x70
Data (High Byte) 0xC0
Data (Low Byte) 0x04
CRC (High byte) 0xAD
CRC (Low byte) 0xFF
Error Response:
Fieldname
Slave Address
0x01
Function Code 0x83
Exception Code (See supported exception codes)
CRC (High byte) 0x..
CRC (Low byte) 0x..