86 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Chapter 5 Configure the I/O Modules
Configure the Safety
Connections
Follow these steps to complete entries when you choose the Safety tab.
1. From the Module Properties dialog box, choose the Safety tab to see the
Safety dialog box.
2. Click Advanced to configure Requested Packet Interval (RPI) and
Configure Connection Reaction Time Limit (CRTL).
Make sure that input RPI is set to match the need. The smallest input
RPI allowed is 6 ms. Small RPIs consume network bandwidth and can
cause nuisance trips because other devices cannot get access to the
network.
As an example, a safety input module with only E-stop switches
connected to it generally can work well with settings of 50…100 ms. An
input module with a light curtain guarding a hazard can need the fastest
response that is possible.
We suggest that you keep the
Timeout Multiplier and Network
Delay Multiplier at their default
values of 2 and 200.
See the GuardLogix Controllers User
Manual, which is listed in the
Additional Resources on page 10
, for
more information about the CRTL.
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