PLC program logic control
PLC LOGIC CONTROLS
In PLC programming application, there are many control processes having
situations requiring an action to be initiated when a certain combination of
conditions are set or happen. For example,an automatic pumping...
More
PLC program logic control
PLC LOGIC CONTROLS
In PLC programming application, there are many control processes having
situations requiring an action to be initiated when a certain combination of
conditions are set or happen. For example,an automatic pumping motor
might have conditions that the pump is set to realize for it to be activated
upon the set conditions. Such is a case where the level sensor needs to be
activated to indicate that the pumping liquid is either at low or high level.
This situation needs involvement of some logic function in the PLC
programming to have the action to be achieved and in the case of a pump an
OR logic should define both condition of low and high level for output to be
realized.
LOGIC FUNCTIONS
AND
This logic function controls situations in which the output remains not
energized unless two normally open switches or relays are both closed. If we
have two switches denoted X and Y, then both switches X and switch Y must
be closed to activate the output.
N
Less
