PaulKraemer
Member
- Join Date
- Jan 2005
- Posts
- 24
Hi,
I am using an AB PLC5. I use a timer (TON) in my logic. I have two rungs that use the .DN bit of this timer as an XIC. Lets say these are rung #10 and rung #20.
I am wondering when the PLC updates the timer .DN bit. It would screw me up if the PLC changed the .DN bit while it was in between processing rungs #10 and #20. Can I be sure that for every scan, rungs #10 and #20 will see the same value for this .DN bit?
Thanks,
Paul
I am using an AB PLC5. I use a timer (TON) in my logic. I have two rungs that use the .DN bit of this timer as an XIC. Lets say these are rung #10 and rung #20.
I am wondering when the PLC updates the timer .DN bit. It would screw me up if the PLC changed the .DN bit while it was in between processing rungs #10 and #20. Can I be sure that for every scan, rungs #10 and #20 will see the same value for this .DN bit?
Thanks,
Paul