User manual

92 Publication 1756-RM093F-EN-P - January 2010
Appendix C Reaction Times
Factors Affecting Logix Reaction-time Components
The Logix Reaction Time components described in the previous
sections can be influenced by a number of factors.
Factors Affecting Logix System Reaction-time
These reaction time components Are influenced by the following factors
Input module delay time Input point delay settings
Type of input module
Input data transfer time via the input
connection
Input module settings for:
(1)
• RPI
• Timeout Multiplier
• Delay Multiplier
(1) These settings are available in RSLogix 5000 software by pressing the Advanced button on the Safety tab of
the Module Properties dialog.
The amount of network communication
traffic
The system’s EMC environment
Controller processing time Safety Task Period setting
Safety Task Watchdog setting
The number and execution time of
instructions in the safety task
Any higher priority tasks that may preempt
safety task execution
Produced/Consumed tag data transfer time
via the produced/consumed connection
Consumed tag settings for:
(2)
• RPI
• Timeout Multiplier
• Delay Multiplier
(2) These settings are available in RSLogix 5000 software by pressing the Advanced button on the Safety tab of
the Consumed Tag Safety Data dialog.
The amount of network communication
traffic
The system’s EMC environment
Output data transfer time via the output
connection
Safety Task Period setting
Output module’s settings for:
• Timeout Multiplier
• Delay Multiplier
The amount of network communication
traffic
The system’s EMC environment
Output module delay time Type of output module