fail-safe Jun 25, 2018 3:43:22 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by WECON Support on Jun 25, 2018 3:43:22 GMT check below link for a simple plc demo about fail-safe. drive.google.com/open?id=1N5T1E1O-kteTtSIEm8A7y8dqJRlz9j1n