Hey so I have this safety relay and a safety PLC from SICK. I wanted to know as to how would my connections be if I am getting a single output from my PLC for each of the light curtains?
Posts by NoobAtWork
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panic mode SkyeFire Thank you. That was quite informative. I'll keep all if these in mind.
Another quick question, if the only safety configuration I am using is x11, then is there a way to reduce the robot speeds when lets say a light curtain is obstructed?
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panic mode Thank you for replying. I understand and I am not going to integrate anything before having a proper knowledge about it. Thanks for the advice. What in your opinion would be the best way to do achieve the same i.e. safety using the outputs from the PLC to X11. Is safety relays the only option? This is just for research purposes and I am not implementing anything as of now.
Display Moreyou would not want someone to build your car or house without knowing what they are doing and following safety standards - someone may get killed or hurt badly. same is with industrial machines and specially robots because they can move suddenly and at high speeds.
robotic safety standards tend to call for safety circuits that are redundant and monitored (CAT 3 or 4, SIL2+)
this means use of safety rated components because they are guaranteed to fail in predictable way. this is why safety components are rated and marked accordingly.
redundant means more than one channel
monitored means there are safety interlocks monitoring for failures. this also means preventing restart if failure was detected. there are different ways of monitoring, using diagnostic pulses or monitoring feedback loops.
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Greetings people!
I am working on an Agilus robot with KUKA KRC4 compact controller. I am using x11 as my safety interface (the robot was ordered with it). I am working on a scenario where there will be safety gates (light curtains, 2 pairs in total). I want the robot to completely stop when someone cuts any of the light curtains. The PLC I am using is a Sick safety PLC, and gives out +24V output. How do I connect my PLC outputs to the X11 interface? Is it like a direct connection using relays? If so can anyone shed some light on it? I went through other posts on this forum related to the same but they were of very little help. I went through the X11 manual as well, everything was clear other than this.
Thanking you in advance.
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