Click PLC Experience - Few Questions

[m_c]

Ignore the code for a moment, and answer the electrical questions.

The turret encoder goes high when active, but does it actively switch low when not-active?
If it does actively switch low (and not just go high-impedance), then it might be able to switch the SZGH inputs directly, but it'll depend on the actual hardware inputs as to whether they'll reliably switch when they're driven to 12V instead of being left open circuit.

As long as the electrical side is switching reliably, then swapping logic is easy enough. In that code sample you posted, you just need to swap the + and -'s

[Chaz]

Ignore the code for a moment, and answer the electrical questions.

The turret encoder goes high when active, but does it actively switch low when not-active?
If it does actively switch low (and not just go high-impedance), then it might be able to switch the SZGH inputs directly, but it'll depend on the actual hardware inputs as to whether they'll reliably switch when they're driven to 12V instead of being left open circuit.

As long as the electrical side is switching reliably, then swapping logic is easy enough. In that code sample you posted, you just need to swap the + and -'s

Yep, 12V when high and 0V when not. This is on its on Power Supply. So not using the 0V or 24V from the controller. Should I join the grounds?

[m_c]

Yep, 12V when high and 0V when not. This is on its on Power Supply. So not using the 0V or 24V from the controller. Should I join the grounds?

Yes, the 0V will need connected.
My only concern is how the SZGH will handle having 12V on the input. I'd think it will work OK, but I'd be checking the relevant inputs are switching cleanly.