goldprospector
Member
Hello again, I am the old guy who's work is sending him to school for a degree in Elect. Tech.
I am in my Intro to PLC class and working with a SLC 150 @ school but and working on assignments at home.
The assignment is a pump that comes on and stays on for 3 minutes, easy enough...
But once the pump turns off...it must remain off for 3 minutes not matter what.
Am I correct in assuming that,in rung #4, an OFF delay timer is the way to go? If so, there was a link posted on here a while back about using an ON Delay as an OFF Delay,(since my home program don't have Off Delay's) but I really don't understand how this works, here is the link
http://www.plctalk.net/qanda/showpo...427&postcount=5
Any help in explaining how simulating Off delay logic with an On Delay would apply to this circuit would be greatly appreciated.
I am in my Intro to PLC class and working with a SLC 150 @ school but and working on assignments at home.
The assignment is a pump that comes on and stays on for 3 minutes, easy enough...
ON/OFF RLY 1
----||----------------------( )---
RLY1 PUMP
----||----------------------( )---
TMR |
----||---
PUMP TMR rt=3min
----||----------------------( )---
But once the pump turns off...it must remain off for 3 minutes not matter what.
Am I correct in assuming that,in rung #4, an OFF delay timer is the way to go? If so, there was a link posted on here a while back about using an ON Delay as an OFF Delay,(since my home program don't have Off Delay's) but I really don't understand how this works, here is the link
http://www.plctalk.net/qanda/showpo...427&postcount=5
Any help in explaining how simulating Off delay logic with an On Delay would apply to this circuit would be greatly appreciated.