Pico Systems USC E-Stop circuit

Hello everybody,

I need to be able to have classicladder monitor the e-stop signal from digital input
Is their a way to connect the last digital input for the e-stop to a classicladder input and also keep
the USC e-stop circuit the same. When I use hal meter to check the signal on digital in 15 it show
no change of state when the switch is pressed, but the USC is working right.

Thanks in advance,

Ken Stanley

kstanley wrote:

Hello everybody,

I need to be able to have classicladder monitor the e-stop signal from digital input
Is their a way to connect the last digital input for the e-stop to a classicladder input and also keep
the USC e-stop circuit the same. When I use hal meter to check the signal on digital in 15 it show
no change of state when the switch is pressed, but the USC is working right.

Thanks in advance,

Ken Stanley

The E-stop loop on digital input 15 is not available directly to the computer.
The only way to sense it is to attempt to come out of E-stop, and if it
stays out of estop then you know the loop has continuity. On older
systems before HAL, we connected the estop loop to digital
inputs 14 and 15, so it could be sensed as a separate signal.

Yes, digital input 15 from the computer side is actually the state of the
E-stop FF in the USC, not the state of the input terminal.

Jon