Posted 4 Jul 2015 does mitsubishi have redundant PLC that is SIL3? Share this post Link to post Share on other sites
Posted 4 Jul 2015 after few clicks google returned this http://promarchive.ru/en/catalog/automation_-_industrial_it/automation/programmable_logic_controllers/safety_plc_-_melsec-qs_ws_series/ but I would download actual manual and read it through: Share this post Link to post Share on other sites
Posted 6 Jul 2015 Redundancy is the opposite of safety. A redundant system has the goal to keep working even though components fail. A Safety system will go into a safe state as soon as a component fails. For a SIL 3 system there are two CPU's in the QS001CPU. However this is not for redundancy but to check the outcome of the first PLC. Both PLC's in a safety PCL are running the same code and should have the same outcome if this is not the case then it should go into a safe state. 1 person likes this Share this post Link to post Share on other sites
