Motion Controllers
Programmable Logic Controllers ( PLCS ) & Programmable Logic Controller
Other maintenance aids are available to help solve malfunctions. One feature intensifies on a CRT that portion of a circuit that is carrying current. Another feature lets an operator command specific inputs or outputs to be unconditionally turned on or off, thus helping a technician determine whether a problem is being caused by an internal or external failure.
Programmable logic controllers ( PLCS ) robot control: Programmable logic controllers ( PLCS ) are often equipped with special firmware (software programmed by programmable logic controller ( PLCS ) manufacturers) through which the controllers can perform many complex procedures according to simple instructions in user programs. Sequencer firmware for programmable logic controllers ( PLCS ) provides the programming, storing, and accessing of data required for simulating electronic, or electromechanical sequencers and programmers. Sequencer data are stored in a data-table section of programmable logic controller ( PLCS ) memory, a section separate from that available for user programs. Programmable logic controllers ( PLCS ) containing sequencer firmware are especially useful for controlling robots where the final position of each movement is determined by limit switches or other on-off, position-feedback devices.
Robot movements can be altered by using different masks for different robot tasks. One method of loading or programming sequencers is with a "teach" mode. This is a technique for loading or setting up the on-off contacts in a sequencer to correspond with the on-off status of I/O points. For this method, a robot is jogged into a desired position. Pressing a "teach" pushbutton energizes a sequencer load instruction that causes the on-off status of all pertinent inputs to be copied into a sequencer step. By jogging the robot through steps sequentially, in each case pressing the "teach" pushbutton, a programmable logic controller ( PLCS ) is "taught" a sequence of movements.
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Programmable Logic Controller & Programmable Logic Controllers ( PLCS ): AC Linear Motion Controller Information
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