Allen-Bradley Compact GuardLogix 5380, Original Instructions Manual

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Rockwell Automation Publication 1756-RM012B-EN-P - April 2018 83
Reaction Times Appendix C
4. Produced/Consumed Safety Connection Reaction Time Limit
(Read from the Safety tab of the consumed tag connection.)
5. Safety Task Period plus Safety Task Watchdog time for Controller B
6. Safety Output Connection Reaction Time Limit
7. Safety output device reaction time
Factors That Affect Logix
Reaction-time Components
A number of factors can influence the Logix Reaction Time components that
are described in the previous sections.
The following sections describe how to access data or settings for many of these
factors.
Table 11 - Factors Affecting Logix System Reaction Time
These Reaction Time Components Are Influenced by the Following Factors
Input device delay Input device reaction time
On-Off and Off-On delay settings for each input channel, if applicable
Safety Input Connection Reaction Time
Limit
Input device settings for:
• Requested Packet Interval (RPI)
• Timeout Multiplier
• Network Delay Multiplier
The amount of network communication traffic
(1)
(1) Network traffic and EMC create a lower limit for the values you can successfully use for Timeout Multiplier and Network Delay
Multiplier.
The EMC environment of the system
(1)
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
(2)
(2) The instructions in your safety task and any higher priority tasks in the controller create a lower limit for the values you can
successfully use for Safety Task Period and Safety Task Watchdog
Any higher priority tasks that pre-empt safety task execution
(2)
Produced/Consumed Safety Connection
Reaction Time Limit
Consumed tag settings for:
• RPI
• Timeout Multiplier
• Network Delay Multiplier
The amount of network communication traffic
(1)
The EMC environment of the system
(1)
Output Connection Reaction Time Limit Safety Task Period setting
Output device settings for:
• Timeout Multiplier
• Network Delay Multiplier
The amount of network communication traffic
(1)
The EMC environment of the system
(1)
Output module delay Output module reaction time