FANUC BG Logic vs a TP loop for a clamp interlock — where do you put it?
The question
R-30iB Plus. Clamp must drop if the PLC loses the ready bit, even mid-TP. I was told BG Logic. I was also told BG Logic is how people hide unsafe shortcuts. What belongs in BG, and what stays in the TP so the next guy can find it?
TS ControlsThe answer
Safety stays in the safety PLC and the fence. BG Logic is for always-on interlocks that are not safety-rated: auto-mode bits, a homing request, a UI map. Comment it. Keep motion in TP. If the clamp is a pinch hazard, it is not a BG assignment — it is dual-channel safety. Don't hide that in a background mix.
Replies from members
- Loading replies…
Log in to reply. Google, X or email.
Confirm your email to post. The link is in your inbox.
