Motion Controllers

Programmable Logic Controllers ( PLCS ) & Programmable Logic Controller

Programmable logic controllers ( PLCS ) are also capable of producing analog outputs and of providing position control functions. Programmable logic controllers ( PLCS ) can even provide control functions normally performed by numerical controls.

A modern programmable logic controller ( PLCS ) can also pass information back to the operator. It can print out its own ladder diagram for record, review, or change, or it can provide status or progress reports in English on a CRT or printer routinely or on request. A programmable logic controller ( PLCS ) can also display messages in English to summarize data or guide the operator.

Data-analysis programs are becoming increasingly common. A spreadsheet format is often used. Usually each programmable logic controller ( PLCS ) is assigned a tag or number. Parameters such as data type, coil, input, and addresses are tracked. The programmable logic controller ( PLCS ) initiates changes to data within the computer database, which initiate other control tasks. For example, if the programmable logic controller ( PLCS ) closes a valve, a software routine can be started that measures resulting flow through the valve and sounds an alarm if the flow is not within desired limits.

The programmable logic controller ( PLCS ) also can track down external faults. This capability is useful because the machine and externally mounted control elements such as limit switches, solenoids, sensors, transducers, remote pushbuttons and selector switches are usually much less reliable, and more often a cause of machine downtime than the programmable logic controller ( PLCS ).

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Programmable Logic Controller & Programmable Logic Controllers ( PLCS ): AC Linear Motion Controller Information

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