On the surface, a programmable logic controller (PLC) ... functional block diagrams, and other programming systems covered under the IEC 61131-3 standard. Not only that, ...

On the surface, a programmable logic controller (PLC) ... functional block diagrams, and other programming systems covered under the IEC 61131-3 standard. Not only that, ...

Programmable Logic Controllers: ... 2,000 control relays; 1,000 system control relays; 500 timers; and 250 counters — all of which are in fact ... When input X001 is asserted, C1, which is used here ...