Electrician Talk banner
1 - 4 of 4 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter · #1 ·
We have rs logix 5000 in the plant using ethernet i/o blocks. We are using safety plc's. They are running production with out a safety signature match or safety task locked in. What are the rules on using plc's as safety, noone in the plant obviously knows....
 

·
RIP 1959-2015
Joined
·
10,750 Posts

·
zap
Joined
·
1,351 Posts
We have rs logix 5000 in the plant using ethernet i/o blocks. We are using safety plc's. They are running production with out a safety signature match or safety task locked in. What are the rules on using plc's as safety, noone in the plant obviously knows....
Really its machine and plant specific. The ultimate deciding factor is how much liability the plant wants to take on.
 

·
Registered
Joined
·
41 Posts
There is nothing wrong with using a PLC in a safety system application provided it meets the requirement of the application. That's what most safety systems are, redundant controllers.

While i'm no expert on the topic at the design level, I do have a good bit of experience in dealing/operating/troubleshooting these systems. There should be someone at the plant that can tell you if its required and if so, to what level of protection that is needed. It is definitely an interesting field to learn on many levels.

Check these out for further reading....
http://en.wikipedia.org/wiki/Safety_instrumented_system
http://en.wikipedia.org/wiki/Safety_Integrity_Level
 
1 - 4 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top