CHAPTER 4: ELECTRICS 4-10
ALPHA 538/552
(9) Programmable controller (PLC)
The programmable controller (PLC) continuously scrutinizes all data from the remote control, probes,
switches, cells, interface, etc.
The program loaded into the PLC manages this information. The PLC then distributes the interface
signals, controls the SERVO drives as well as the pneumatic valves, and displays the appropriate
messages on the remote control station.
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