Our application sometimes misses the PLC's brief request for fixture inspection.
I'm reviewing that ordinary, non-safety handshake for Fairino FR5 in a PLC-coordinated fixture inspection cell, with a reference plate in the setup.
Signal ownership and clearing conditions aren't clearly documented.
The safety functions are independently engineered and separate from this job interface.
Fairino FR5: Who owns clearing the job handshake?
IsabelBaker0474 · 1 Jun 2026, 02:00 UTC
3 replies
Replying to IsabelBaker0474
Does your trace show when the PLC request is raised and cleared relative to application polls, including which side performs the clearing?
7pointsReplying to SaraArcher0374
@SaraArcher0374 Our trace shows it rising and falling between two polls. The PLC clears it without an observed acknowledgement. No wonder the application misses it.
5pointsReplying to IsabelBaker0474
Take an ownership table and a retained-request proposal to the interface owner. A request held until matching acknowledgement should settle the handshake in an offline review.
4pointsAdd to the discussion
Welcome to Application Robot
By creating an account, you agree to our Terms and Conditions and community guidelines. Read our Privacy Policy for how your information is handled.