Rockwell Automation 1791ES-IB16 Guard I/O EtherNet/IP Safety Modules - Manual (Page 57)

Rockwell Automation Publication 1791ES-UM001D-EN-P - May 2013 57
Configure the I/O Modules by Using the Logix Designer Application Chapter 5
3. From the Safety dialog box, choose Advanced to see the Advanced
Connection Reaction Time Limit Configuration dialog box.
Make sure that input RPI is set to match the need. The smallest input RPI
allowed is 6 ms. Selecting small RPI's consumes network bandwidth and
can cause nuisance trips because other devices can't get access to the
network.
As an example, a safety input module with only ESTOP 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.
Selecting appropriate RPI's will result in a system with maximum (best)
performance.
IMPORTANT Analyze each safety channel to determine what is appropriate. The default
timeout multiplier of 2 and network delay multiplier of 200 will create an input
connection reaction time limit of four times the RPI and an output connection
reaction limit of three times the RPI. Changes to these parameters must be
approved by a safety administrator.
We suggest that you keep the
Time-out Multiplier and Network
Delay Multiplier at their default
values of 2 and 200.
See GuardLogix Controllers User
Manual, listed in the
Additional
Resources on page 7 , for more
information about the CRTL.