I have been having a DCS issue where I am trying to have a simple safety condition where SSO = SPI ( which is an Input from my Safety I/O Conversion Board ). SSO being the Safe System Output for triggering an Ext Emergency Stop when conditions are unsafe, and SPI being connected to my Safety Output on a Safety Relay and connected to a Safety Interlock. It seems that whenever conditions are "safe", meaning both SSO and SPI are ON ( shown as "@SSO = @SPI" in my DCS Safe I/O Connect Screen ), it still will display the alert for SSO "SRVO-408 Ext Emergency Stop" when pressing the deadman switch to try to move the robot.
Now in regards to the wiring of my Safety Interlock > Safety Relay > Safety IO Conversion Board, I will explain exactly how I am wiring the Safety Relay to the Safety IO Conversion Board. Starting with the Safety IO Conversion Board we have SFDI11 and SFDI21 which makes up SPI. SFDI21 gives out 24V and SFDI11 seems to be the actual input value being read in for SPI. SFDI21 delivers power to a terminal on the top side of my Safety Relay, which will open or close power to the bottom terminal of the Safety Relay. Then, the bottom terminal of the Safety Relay is wired into SFDI11. Essentially in the end I create a loop starting from SFDI21 > top terminal of Safety Relay > bottom terminal of Safety Relay > SFDI11. So, with just wiring this one input I don't think wiring is the issue here in my opinion. I haven't touched or messed with any of Fanuc's boards other than the two terminals for SPI on the Safety I/O Conversion Board.
We can toggle on and off power (lock/unlock Safety Interlock) to our input on the Safety IO Conversion Board just fine and see the change in status of SPI and SSO immediately. My condition in the Safe IO looks like this "@SSO = @SPI", the @ symbols indicating that both are powered on and are safe. However, upon hitting the deadman switch or fault reset in auto mode in this safe state, the SRVO-408 alert will trigger and the status of my SSO and SPI are both still showing as ON. I wanted to explain this clearly because with just wiring this one input I don't think wiring is the issue here in my opinion. I haven't touched or messed with any of Fanuc's boards other than the two terminals for SPI on the Safety I/O Conversion Board.
I've also called Fanuc for two weeks straight and they weren't much help in resolving this matter. So, if you have any suggestions or solutions for resolving this issue it would be greatly appreciated.
Thank you for your time.