Define a module component Chapter 4
Rockwell Automation Publication 1756-RM084S-EN-P - March 2015 77
Module connection attributes in a safety controller system
A module connection in a safety controller system has these attributes, in addition
to the module connection attributes previously described.
Attribute Description
TimeoutMultiplier Specify the timeout multiplier (default = 2) for a safety controller system. This value determines the RPIs of time to wait
for a packet before declaring a time out. This translates into the number of messages that may be lost before declaring a
connection error. A Timeout Multiplier of 1 indicates that no messages may be lost; that is, there must be a packet every
RPI. A Timeout Multiplier of 2 indicates that 1 message may be lost; that is, as long as a packet is seen in 2 times the RPI,
no time-out will occur. Type a number from 1...4.
NetworkDelayMultiplier Specify the network delay multiplier (default = 100%) for a safety controller control system. This value lets you reduce
or increase the connection reaction time limit in cases where the transport time of the message is significantly less or
more than the RPI. This may be the case when the RPI of an output connection is the same as a lengthy task period. Type
a percentage from 10...600.
ReactionTimeLimit Specify the connection reaction time limit (0...5500032) for a safety controller system. The Logix Designer application
calculates the connection reaction time limit as a function of the RPI, timeout multiplier, and network delay multiplier.
The connection reaction time limit is automatically recalculated if any of the values change.
MaxObservedNetworkDelay L5X only. The MaxObservedNetworkDelay is a measure of the longest time data for a safety connection is delayed from
transporting the safety packets over the network. This attribute is exported for informational purposes only and is
ignored on import.
Observe these guidelines when defining a module.
• Attributes can be in any order. They export in the order defined.
• A parent module must be defined before any definitions of its
child modules.
Module guidelines
