PLC SEQUENCERS
PLC SEQUENCERS
(OP)
I am familur with Ladder logic but do not have much experience with sequencers. Does any body know of a good book that explains how they work? Or sources for any simular info.
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RE: PLC SEQUENCERS
RE: PLC SEQUENCERS
EG
State Valve1 Valve2
Idle Closed Closed
Fill Open Closed
Empty Closed Open
Then you just have to set the row number to set all the devices.
You can do similar things with inputs, for example to get a boolean that tells you whether all the devices are in the right state.
This way you can create sequences where the steps and transitions can be changed just by changing the data rather than the code.
And because they are very fast and memory efficient the resuting program is small and fast.
You can do similar things with other PLC's by the way, but maybe not so easily.
RE: PLC SEQUENCERS
RE: PLC SEQUENCERS