Hi all,
I'm new to the PLC world and i'm currently using Schneider Electric Unity Pro XL software. I need advice or sample programming on the problem below.
there are 3 demand and 3 pump (Pump A, B and C). Each demand will start 1 pump and if there is 2nd demand coming in, then the 2nd pump will turn on. If one of the demand is turn off, then the first pump will turn off and then if the 2nd demand is turn off, then the 2nd pump will turn off, following the FIFO rule. Then, if there is new demand coming in, the demand will turn on Pump B instead of Pump A or C.
Anyone have idea on how to write it?
Attach is my program in DFB
http://www.4shared.com/file/SEJKqBjU/test1.html
Please help...
I'm new to the PLC world and i'm currently using Schneider Electric Unity Pro XL software. I need advice or sample programming on the problem below.
there are 3 demand and 3 pump (Pump A, B and C). Each demand will start 1 pump and if there is 2nd demand coming in, then the 2nd pump will turn on. If one of the demand is turn off, then the first pump will turn off and then if the 2nd demand is turn off, then the 2nd pump will turn off, following the FIFO rule. Then, if there is new demand coming in, the demand will turn on Pump B instead of Pump A or C.
Anyone have idea on how to write it?
Attach is my program in DFB
http://www.4shared.com/file/SEJKqBjU/test1.html
Please help...
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