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Fieldbus Controller 750-841 • 75Data ExchangeWAGO-I/O-SYSTEM 750ETHERNET TCP/IP3.1.6.5 Data Exchange between PLC Functionality (CPU) and I/O ModulesThrough absolute addresses, the PLC functionality of the controller candirectly address the I/O module data.The PFC addresses the input data with absolute addresses. The data can thenbe processed, internally in the controller, through the IEC 61131-3 program,whereby the flags are filed in a permanent memory area. Following this, thelinking results can be directly written in the output data via absoluteaddressing.%IW0 %QW0%QW255%IW255%IW512%IW1275%QW512%QW1275PII = Process InputImagePIO = Process OutputImageInputs OutputsI/O modules 750-4xx....6xxPII PIOPLC functionality (CPU)Inputs OutputsProgrammable Fieldbus ControllerFig. 3-10: Data exchange between PLC functionality (CPU) and I/O modules 15043e |
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