Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
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Chapter 4 Safety Function
Blanking is not available on 450L PAC safety light curtains.
Response Time
The response time (T
r
) of the light curtain is the time from when the protective
field of the light curtain is interrupted to when the safety outputs turn OFF.
The light curtain features that are used in the application affect the response
time.
Standard Response Time, T
s
The standard response time refers to the response time for standard on/off
application. The standard application includes the following:
•
Any start mode
•
All operating ranges
•
All EDM settings
The standard application excludes the advanced features:
•
Beam coding
•
Interference Rejection
•
Blanking (fixed or floating)
•
Cascading
•
Multiple zones
•
Muting
•
Reduced resolution
•
Multiple scans
•
Short interruption ignore time
For the purposes of determining the response time, floating blanking is
equivalent to reduced resolution.
Although muting is considered an advanced feature, muting has no effect on
the response time.
The standard response time is dependent on the following:
•
Light curtain type (PAC or POC [B or E])
•
Resolution (finger or hand)
•
Protective height
The standard response time for the 450L-B safety light curtain is shown in
. The standard response time for the 450L-E safety light
. In these tables, Tr = Ts.