What is the OMRON PLC-based Process Control?
OMRON PLC-based Process Control system is based on the SYSMAC CS/CJ PLC Series. By adding PLC-based Process Control units to the basic system configuration, PLC process control functions can be simply added on to the basic functions already installed in the PLC.
Thus, it can be used for devices that it is compatible with such process control system in which DCS was used before or devices in which several controllers were used combined.
With the PLC Installation System, analog processing is carried out by the loop control section or the loop control unit/board (hereafter "loop controller"), and ladder processing is handled by the CPU. Communication between the two sections is made using bits of memory. Since the analog processing and ladder processing can be completely separated and the program is more simple than a ladder only program, the engineering process to construct the system is facilitated.
Thus, it can be used for devices that it is compatible with such process control system in which DCS was used before or devices in which several controllers were used combined.
With the PLC Installation System, analog processing is carried out by the loop control section or the loop control unit/board (hereafter "loop controller"), and ladder processing is handled by the CPU. Communication between the two sections is made using bits of memory. Since the analog processing and ladder processing can be completely separated and the program is more simple than a ladder only program, the engineering process to construct the system is facilitated.
System configuration of PLC-based process control
The loop controller does not have an external analog I/O or an external contact I/O function.
It is used together with such a unit that has the interface function including an analogue I/O unit, as shown in the diagram below.
It is used together with such a unit that has the interface function including an analogue I/O unit, as shown in the diagram below.
Also, when programming, in addition to the programming software for the CPU Unit (CX-Programmer, additional programming software (CX-Process) will be required to create Function block data. And in order to monitor and alter settings during operation, a HMI section will also be required, in combination with the application in use.
| Program Creation Section | Operation/Display Screen Creation Control Block/Sequence Creation | CX-Process Tool CX-Programmer | |
| HMI Section | Application Section | Batch management, brand management, remote surveillance (Web) Data gathering, data analysis | Third Party Products etc |
| Operation/Display Section | Meter screen, graphics screen, trends, Warning history, operational history, operational guide | CX-Process Monitor Plus NS Series etc. | |
| Control Section | Loop Control Section | Function Block (FBD), Sequence Table, Step ladder | Loop Controller Loop Control Board/Unit or Process CPU/Loop CPU (Loop Control Section) |
| Sequence Control Section | Ladder, FB (Ladder/ST Language) | CS/CJ Series CPU | |
| Signal I/O Section | Analog I/O, Digital I/O, Pulse Input | Process/Analog I/O Unit Digital I/O Unit etc. | |
| Signal Conversion (Signal Conditioner) | Temperature, Current/Voltage, Isolator, Pulse, Distributor | ||
| Field Device | Sensor, Actuator | ||
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