hickman
Member
I have 12, 3-phase, motor-starters that I want to be able to control. Each motor-starter is 240VAC with a 240VAC coil. Currently, a pressure switch breaks/makes one leg of the coil for control.
I want my program to scan units 1 thru 12. When it finds a unit that needs power, the PLC should allow the unit to come on, but NOT continue scanning until a timer expires (30 sec). The only way I've found to implement this, so far, is to put the 30 second time delay in between units scanned. In other words, I check In_1 for service request. Wait 30 seconds. Check In_2 for service request....
My solution is not very efficient, but it IS do-able. I'm just looking for a more efficient solution.
Thanks in advance for the help!
I want my program to scan units 1 thru 12. When it finds a unit that needs power, the PLC should allow the unit to come on, but NOT continue scanning until a timer expires (30 sec). The only way I've found to implement this, so far, is to put the 30 second time delay in between units scanned. In other words, I check In_1 for service request. Wait 30 seconds. Check In_2 for service request....
My solution is not very efficient, but it IS do-able. I'm just looking for a more efficient solution.
Thanks in advance for the help!