PLC Programming Rules #1

PLC Programming 42.4 PLC Design Tips #1 & 2 PLC Design Tips #1 & 2 ? Dedicate control relays for specific functions (such as starting the system, activating a solenoid, etc.) ? Control … PLC Programming 42.1 PLC Programming Rules #1-3-3 1)Ladder diagrams are drawn vertically with inputs on the left and outputs on the right. 2)Each rung of the ladder has _____ output. 3)An individual output device can appear on the ladder diagram only _____. PLC Programming Rules #4-5-5 4) An individual physical input …


PLC Programming Rules #1 -3 -3
1)Ladder diagrams are drawn vertically with inputs on the left and outputs on the right.
2)Each rung of the ladder has ____________ _______________ output.
3)An individual output device can appear on the ladder diagram only _____________. PLC Programming Rules #4 -5 -5 4) An individual physical input device (limit
4) An individual physical input device (limit switch, push -button, pressure switch, etc.) -button, pressure switch, etc.) may be used _______________________ may be used _______________________ _________________ on the ladder diagram _________________ on the ladder diagram in both N.O. and N.C. configurations. in both N.O. and N.C. configurations.
5) Internal contacts of the PLC are 5) Internal contacts of the PLC are represented as conventional control relays represented as conventional control relays and contacts. and contacts. PLC Programming Rules #6 -8 -8
6) Control relay coils (outputs) appear on the ladder diagram __________________.
7) Control relay contacts are inputs and may be used as many times as necessary on the ladder diagram in both N.O. and N.C.configurations.
8 ) Any rung of the ladder diagram may be “OR”edwith a following rung at ________ ___________________________…..

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