1756-IF8 Signal Input and Output Function


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1756-IF8 Signal Input and Output Function

The control operation part is mainly completed by 1756-IF8, and the application software of the control system is used to complete the main functions of signal input, processing and control output. The output part includes alarm device, conveying and power device, and fixing device. 1756-IF8’s alarm device consists of flashing red, yellow and green lights and alarm bell, and the three colours correspond to three different alarm levels. Green means that the system is normal, yellow means that the system parameters are out of range, but still work, need to be processed; red alarm and accompanied by the alarm sound, must be emergency shutdown processing.

1756-IF8 conveying device is controlled by the PLC output signal to control the main circuit, sending instructions to the motor, so that it automatically complete the transfer of raw materials and power transmission. Hydraulic device is a fixed device, the signal given by PLC controller, through the solenoid valve to control the hydraulic equipment, the raw material will be fixed in a certain position, for raw material processing services.

1756-IF8 for PLC system, due to limited memory resources, complex intelligent diagnosis is difficult to achieve, for this reason, the addition of fault diagnosis intelligent module, the module is based on microcontroller, using C51 programming, can be convenient to achieve a variety of control algorithms. 1756-IF8 using fault tree reasoning combined with expert rule-of-thumb reasoning, the use of intelligent modules of the I / O function and internal information for fault diagnosis.