Data flow and software flow of the control system

1. Data flow direction

(1) The PLC reads the field data (standard 4-20 mA signal) through the analog input module, and converts it into standard engineering units through program calculation according to the range of the instrument; reads the pulse signal of the flowmeter through the high-speed counting module 

The measurement subroutine is called by the main program, and the instantaneous value and cumulative value of the flow are calculated according to the pulse/flow ratio; the calibration of the flowmeter is realized by reading the position switch status of the volumetric tube through the switch input and output module, and controlling the start and stop of the volumetric tube ;

(2) The IPC uses the communication module to read data from the PLC, and records it in the local historical database. The application program reads and displays the field data and the instantaneous and cumulative values ​​of the flow; at the same time, the PLC also reads the data through the communication module. And execute the operation instruction of IPC;

(3) The PLC  ( B&R X20AT6402 I/O Module, Siemens 6ES7323-1BL00-0AA0 SIMATIC S7-300 Digital Module Module , Allen Bradley 1769-OB32 Discrete Output Module, B&R X20ai4632-1 Analog Input Module  ) transmits the collected and calculated parameters of the inspected flowmeter to the IPC, and the IPC calls the Excel report system for recording. After the calibration is completed, the calibration report and calibration conclusion will be automatically printed out.

The interested persons of mentioned parts may relate with me, price liberally. --

Vivi (sh_plc@163.com).