作者: Anthony J. Cachat , Marion Kosem , Thomas D. Toth
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摘要: An industrial control system device that can be utilized for drive control, process and/or logic and which is comprised of a unique combination hardware software. Use one or more the devices in an application permits to partitioned into subsystems communicate with another operate as self-contained units. Each subsystem further subdivided modules have distinct operating functions. The software by separates required functions tasks concurrently (multi-tasking) on priority level basis while sharing data signals. Three programming languages (BASIC, Control Block, Ladder Logic) are employed so most appropriate language each task. Processors added permit movement task from processor (multi-processing) without reprogramming.