Rockwell Automation 1756-SPESMNRMXT GuardLogix Controllers User Manual - Manuel (Page 73)

Rockwell Automation Publication 1756-UM020I-EN-P - August 2012 73
Add, Configure, Monitor, and Replace CIP Safety I/O Chapter 5
acknowledge back to the controller. The Maximum Observed Network Delay is
shown on the Safety tab of the Module Properties dialog box. When online, you
can reset the Maximum Observed Network Delay by clicking Reset.
Figure 19 - Resetting the Max Observed Network Delay
Setting the Advanced Connection Reaction Time Limit Parameters
Figure 20 - Advanced Configuration
Timeout Multiplier
The Timeout Multiplier determines the number of RPIs to wait for a packet
before declaring a connection timeout. This translates into the number of
messages that may be lost before a connection error is declared.
For example, a Timeout Multiplier of 1 indicates that messages must be received
during every RPI interval. A Timeout Multiplier of 2 indicates that 1 message
may be lost as long as at least 1 message is received in 2 times the RPI (2 x RPI).
IMPORTANT The actual Maximum Network Delay time from the producer to the
consumer is less than the value displayed in the Maximum Network Delay
field on the Safety tab. In general, the actual maximum message delay is
approximately one-half the Maximum Network Delay value that is
displayed.