Abstract
This design uses GPRS wireless communication technology to achieve remote control of the stepper motor. The system design the software of upper machine by the VC++ based on the TCP/IP protocol. The wireless module SIM300 transfers data to the primary station by its GPRS function. Then the primary station converters the input into differential signal and send commands to slave stations via RS485 and Modbusprotocol. According to the commands, slave stations output the corresponding control signal to the stepper motor. Stepper motor has some protection function when working, such as: acceleration and deceleration and down limit , emergency stop , over-temperature .The result of experiments verifies that the aim of design GPRS-based remote control of stepper motor is realized. It is possible to improve largely both in real-time performance and reliability by using the GPRS wireless technology, it promotes the industrial monitoring and control system more intelligent and informed.
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