A Systems Approach to Programmable Controllers
because of its relationship with programmable controller ladder diagram circuits. ... The systematic circuit symbols used in the ladder diagram are: ac PB - pressbutton or pushbutton; ac CR - control relay or control relay ... The programmable logic controller (PLC), or programmable controller (PC), is designed to allow field wiringanbsp;...
| Title | : | A Systems Approach to Programmable Controllers |
| Author | : | Fred Swainston |
| Publisher | : | Cengage Learning - 1991 |
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