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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
Chapter 4 Safety Function
When the STS status indicator at the transmitter is blinking red/green, it
indicates that the Tx stick beam coding must be paired with the Rx stick.
Follow the procedure that is described in
Interference Rejection
Interference rejection is only configurable for the 450L-E safety light curtain
and is permanently enabled on the 450L PAC safety light curtain.
Interference rejection is an enhancement to beam coding to mitigate optical
interference and cross talk. In applications where enabling beam coding alone
does not mitigate interference, the interference rejection feature can be
enabled to alter the scan pattern to restrict stray light from a neighboring
450L-E safety light curtain from affecting operation. Set interference rejection
with the appropriate DIP switch
(a)
on the plug-in of the receiver.
Another application for interference rejection is in cascaded systems, as the
sticks can be mounted closely without needing to adhere to the minimum
distance spacing requirements.
Blanking and Reduced
Resolution
Blanking and reduced resolution is only configurable for the 450L-E safety
light curtain.
Blanking and reduced resolutions are typically used to allow objects wider than
the optical resolution to stay in or to pass through the protective field during
normal operation without causing a fault or stop condition (for blanking
application, see
Fixed Blanking Application on page 182
Both are available in the 450L-E safety light curtain per DIP switch
configuration:
•
•
Reduced Resolution (Object Number Limited)
ATTENTION:
If several systems are in the area, only one single transmitter is
allowed to be paired with a given receiver. Make sure that any other adjacent
installed safety light curtain system is switched off during the pairing
process.
The beam coding settings do have an impact on the response time (see
).
(a) Setting interference rejection by DIP switch assumes the worst case scenario of protection from a neighboring 1950 mm (76.78 in.) length
stick with finger resolution, irrespective of the actual length or resolution of the sticks. See
. You can refine and greatly
reduce response time by configuring interference rejection in the software, see
IMPORTANT
Using interference rejection affects the response time, which can
impact safety distance. Always verify safety distance when using this
feature.
IMPORTANT
You must verify for all blanking and reduced resolution modes that no
undetected access is possible into the danger zone via the blanked
protective field throughout the whole width of the protective field (also
left and right of the blanked object). This verification can be achieved,
for example, by using additional mechanical barriers.
The blanking settings do have an impact on the response time (see
).
Muting and blanking cannot be configured simultaneously. It is possible
to activate fixed blanking and reduced resolution simultaneously.
Содержание Allen-Bradley 140M
Страница 8: ...8 Rockwell Automation Publication 450L UM001F EN P March 2022 Table of Contents Notes ...
Страница 20: ...20 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 2 Safety Concepts Notes ...
Страница 108: ...108 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 7 Status Indicators and Troubleshooting Notes ...
Страница 114: ...114 Rockwell Automation Publication 450L UM001F EN P March 2022 Chapter 8 Safety Instructions Notes ...
Страница 184: ...184 Rockwell Automation Publication 450L UM001F EN P March 2022 Appendix B Typical Installations Notes ...
Страница 190: ...190 Rockwell Automation Publication 450L UM001F EN P March 2022 Index ...
Страница 191: ...Rockwell Automation Publication 450L UM001F EN P March 2022 191 GuardShield Safety Light Curtain User Manual ...