Introduction - Allen-Bradley SmartGuard 600 User Manual

Introduction

Receiving Explicit
Messages
207
Explicit Messages
Topic
Receiving Explicit Messages
Sending Explicit Messages
Access Controller Parameters Using DeviceNet Explicit
Messages
Sending an explicit message from a standard DeviceNet master to the
SmartGuard controller enables reading or writing any specified data or
parameters of the SmartGuard controller. The controller performs
according to a command sent from the master and returns a response.
A read command reads the SmartGuard local I/O or safety slave I/O
area allocated to the SmartGuard controller from the master.
The basic format of the command and response are shown below.
Command Format
Destination
Service Code Class ID
Node
Address
4B
Normal Response Format
Number of Receive
Bytes
Error Response Format
Number of Receive
Bytes
00 04
Command Format
The Destination Node Address specifies, in 1 byte hexidecimal, the
node address of the data to be read.
Instance
ID
03 56
Service
Originating Node
Address
Service
Originating Node
Address
Publication 1752-UM001A-EN-P - October 2006
D
Appendix
Page
207
210
212
Offset Data
Address Size
Read Data
Code
CB
Error Code
Code
94