Omron PLC process control - solution - Huaqiang Electronic Network

The OMRON plc process control system is a process control system based on the SYSMAC CS/CJ series PLC. Because the PLC process control product is built on the basis of the general PLC, the basic performance of the PLC can be added to the process control function as it is. Therefore, it is applicable to a mechanical control system that has been conventionally used in combination with a process control system by dcs and a plurality of regulators. In the PLC process control system, the analog operation processing is performed by the loop control unit or the loop control board (hereinafter referred to as LCB). The data operation processing is performed by the main CPU. Exchanging with each other is performed by the flag of the memory. The analog operation processing and the ladder operation processing can be completely separated, and the program is simplified as compared with the configuration in which only the ladder operation is performed, so that the system construction technique is also simple.

Structure of PLC process control system

The LCB does not have external analog input and output and external contact input and output functions. As shown in the figure below, it should be used in combination with a unit with an external interface function such as an analog input/output unit.

In addition, in programming, in addition to the main CPU unit program software (CX-Programmer), it is also necessary to form program software (CX-Process tool) for forming function block data. In addition, in order to monitor and set the set value, the hmi part is matched with the application program and used in combination.

Program construction department (technical site)

Operation control/display screen construction control block/timing construction

CX-Process Tool CX-Programmer

HMI Department (Executive Site)

application

Batch management, brand management, remote monitoring (Web) data collection, data analysis, RSView 32 add-on procedures, third-party products, etc.

Operation/display unit

Operator screen, graphic screen, trend, alarm record, operation record, operation guide CX-Process monitor PlusRSView 32NS series, etc.

Control unit (area controller)

Process control

Function block (FBC), timing chart, step ladder

LCB process CPU / loop CPU

Timing control

Ladder diagram, FB (ladder/ST language)

CS/CJ series CPU

Signal input and output

Analog input and output, digital input and output, pulse input

Process/analog input/output unit digital input/output unit, etc.

Signal conversion unit

Temperature → current / voltage, isolator, pulse, distributor

Regional equipment

Sensor, actuator