Who invented programmable logic controller?
Programmable logic controller was invented by the Austrian-born American engineer Odo J. Struger in 1958–60 at the Allen-Bradley company in Milwaukee, WI, USA. A programmable logic controller, or PLC, is a simple electronic device that allows precise numerical control of machinery.
Why choose IDEC’s programmable logic controllers?
Whether it is system flexibility, space saving, ease of maintenance or powerful programming features, IDEC’s programmable logic controllers along with exceptional product support will exceed your expectations.
What is a compact programmable logic controller?
Compact Programmable Logic Controllers Smaller than other PLCs, these controllers save space in your control cabinet. They combine the functionality of a relay, timer relay, and switch in one unit, so you can program simple automation jobs.
Can interlock safety interlock be implemented in programmable logic controllers?
Programmable logic controllers are a potential candidate for implementing interlocks due to excellent capability of implementing discrete logic. However, implementation of safety interlocks in programmable electronic systems is not universally accepted and many organizations require that all safety interlocks be hard-wired.
How do the 198 programmable logic controllers move?
For the rung shown, when there is an input to | | in the rung, the 198 Programmable Logic Controllers move occurs from the designated source address to the designated destination address.
How does a timer work on a 160 160 programmable logic controller?
160Programmable Logic Controllers 9.2.1 Sequencing As an illustration of the use of a timer, consider the ladder diagram shown in Figure 9.5(a). When the input In 1 is on, the output Out 1 is switched on. The contacts associated with this output then start the timer.