Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 137)

Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013 137
Appendix
A
Get Point Status from Modules by Using Explicit
Messaging
Considerations for Obtaining
Point Status This appendix provides information about how to use explicit messaging to get
diagnostic status information from the modules.
To maximize throughput when using DeviceNet safety I/O modules, consider
the requested packet interval, baud rate, and the size of the I/O assembly.
Keeping the I/O assembly at 2-bytes or fewer does not provide individual point
status necessary to quickly diagnose what point faulted from an operator
terminal.
Topic Page
Considerations for Obtaining Point Status 137
1791DS-IB8XOB8 Module Definition Configuration 138
1791DS-IB4XOW4 Module Definition Configuration 142
I/O Assembly and Reference Data 148
Explicit Messages 155
Basic Format of Explicit Messages 157
Explicit Messages 158