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Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
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.
The following sections describe how to access data or settings for many of these
factors.
Accessing Input Module Delay Time Settings
To configure input module delay time in RSLogix 5000 software, follow these
steps.
1.
In the configuration tree, right-click your I/O module and choose
Properties
2.
Click the Input Configuration tab.
Table 14 - Factors Affecting Logix System Reaction-time
These reaction time components
Are influenced by the following factors
Input module delay
Input module reaction time
Each input channels On-Off and Off-On delay settings
Safety Input Connection Reaction Time Limit
Input module settings for:
•
Requested Packet Interval (RPI)
•
Timeout Multiplier
•
Delay Multiplier
The amount of network communication traffic
The system’s EMC environment
Safety Task Period and Safety Task Watchdog
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 Safety Connection Reaction
Time Limit
Consumed tag settings for:
•
RPI
•
Timeout Multiplier
•
Delay Multiplier
The amount of network communication traffic
The system’s EMC environment
Output Connection Reaction Time Limit
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
Output module reaction time
