Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 109)

Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013 109
Configure Modules in RSNetWorx for DeviceNet Software Chapter 6
These message types will appear differently, depending on the safety I/O module
you select, but in general the:
• bit-strobe and polled connections provide the I/O data values and channel
status.
• polled connection can write standard data to the I/O module.
Only use this if the test outputs are configured as standard outputs, and
those standard outputs can then be controlled from the scanner.
• change of state (COS) and cyclic connections provide power status, which
cannot be obtained from bit strobe or polled connections.
Troubleshooting If you attempt to go into Execute mode after a change is made to the 1791DS
module (which breaks the safety connection to the SmartGuard controller), you
will see the D6 message on the SmartGuard controller’s ASCII display.
To resolve this anomaly, in the SmartGuard 600 properties dialog box, click the
Safety Connection tab. This message appears if there has been an update to a
1791DS module that is not reflected in the offline configuration.
Click Yes to resolve those differences. Next, click Apply and then Yes to
download the updated software changes to the SmartGuard 600 controller.
If the differences are resolved, you can go into Execute mode without seeing the
D6 message on the SmartGuard controller’s ASCII display.