Method and system for testing PLC program and PLC monitoring software

• Main Authors: LIU ZHIFENG, GONG JINLONG, ZHAO YONGSHENG, GUO YILIANG, YANG CONGBIN, CHENG QIANG
• Format: Patent
• Language: Chinese; English
• Published: 20.11.2018
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The invention discloses a method and system for testing a PLC program and PLC monitoring software. The system comprises a hardware system and a software system. The software system uses QT/Embedded todevelop a man-machine interaction interface, adopts a PID control algorithm to construct a controller which performs multipath adjustment of parameters, can effectively adjust signals related with different digital quantities and analog quantities, realizes the effect that a controlled object reaches a steady state quickly, and adjusts the parameters accurately. The hardware system includes a storage module, a communication module, a peripheral function module, a power module, a control module, a signal conversion module, a virtual digital quantity output module, a virtual digital quantity input module, a virtual analog quantity output module and a virtual analog quantity input module. The method and system for testing a PLC program and PLC monitoring software can accurately simulate thechange of the environment