System Reaction Time; Logix System Reaction Time; Simple Input-Logic-Output Chain - Allen-Bradley GuardLogix 5580 Original Instructions Manual

System Reaction Time

Sensor Reaction
Time
Input Device

Logix System Reaction Time

To determine the system reaction time (see
for details) of any control chain, you must add up the reaction times of all of
components of the safety chain.
System Reaction Time = Sensor Reaction Time + Logix System
Reaction Time + Actuator Reaction Time
Figure 24 - System Reaction Time
Input Reaction
Time
Input Connection
Delay Reaction Time Limit
The following sections provide information on how to calculate the Logix
system reaction time for a simple input-logic-output chain and for a more
complex application by using produced/consumed safety tags in the logic
chain.

Simple Input-logic-output Chain

This section describes the Logix system reaction time for any simple input to
logic to output chain.
Figure 25 - Logix System Worst-case Reaction Time for Simple Input to Logic to Output
Reaction Time
1. Safety Input
Device Delay
Rockwell Automation Publication 1756-RM012B-EN-P - April 2018
System Reaction Time
Safety Task
Reaction Time
Logix System Reaction Time
Controller
Reaction
Time
3. Controller
2. Safety Input Connection
Reaction Time Limit
Safety Network
Reaction Times
System Reaction Time on page 13
Output Reaction
Time
Output Connection Output Device
Reaction Time Limit Delay
4. Safety Output Connection
Reaction Time Limit
Appendix C
Actuator
Reaction Time
5. Safety Output
Device Delay
81