B&r X20 CP 0292 + X20 BB 22 X20CP0292 Excellent Condition
Product Quick Detail
- FOB Price
- USD $999.00 / Piece
- Place Of Origin
- GERMANY
- Minimum Order
- 1
- Packaging
- 1PC
- Delivery
- 15 Days
Specifications
The most basic function of a programmable controller is to emulate the functions of electro-mechanical relays. Discrete inputs are given a unique address, and a PLC instruction can test if the
input state is on or off. Just as a series of relay contacts perform a logical AND function, not allowing current to pass unless all the contacts are closed, so a series of "examine if on"
instructions will energize its output storage bit if all the input bits are on. Similarly, a parallel set of instructions will perform a logical OR. In an electro-mechanical relay wiring diagram, a
group of contacts controlling one coil is called a "rung" of a "ladder diagram ", and this concept is also used to describe PLC logic. Some models of PLC limit the number of series and parallel
instructions in one "rung" of logic. The output of each rung sets or clears a storage bit, which may be associated with a physical output address or which may be an "internal coil" with no
physical connection. Such internal coils can be used, for example, as a common element in multiple separate rungs. Unlike physical relays, there is usually no limit to the number of times an input,
output or internal coil can be referenced in a PLC program.
- Country: China (Mainland)
- Business Type: :Bently Nevada, ABB,GE,Rockwell,Foxboro, Invensys Triconex, Westinghouse, Schneider,Siemens,Woodward,GE FANUC,Yaskawa,EPRO,and so on.
- Market:
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- Contact:Holly
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