Abstract:
As customers have higher requirements for the environment of filling equipment, a large number of purification fans (FFU) have been applied to filling equipment. Economic cost, simple and quick installation, operation, and maintenance have become the key factors in the control scheme. To address this issue, we propose using Siemens PLC with MODBUS TCP communication control for FFUs equipped with an RS485 communication module. The PLC periodically controls the reading and writing of FFU data to achieve 1-3 level speed control of the FFU, as well as current and fault information reading functions. The use of array structure variables and FOR loops in the program enhances the portability and ease of modification of the program.
Keywords: Siemens TIA Platform; FFU; MODBUS TCP Communication Protocol; Array Structure