rangerskm
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Hi friends,
i have to do a project by using PLC and PIC16F877A,
the project is to transfer the datas from PLC CONTROLLER to PIC16F877A by using MODBUS protocol in PLC,and based on that datas stepper motors have to work..
the reason for doing this project is that my actual cost for interfacing 246 stepper motor in PLC is huge as each motor occupies 4 pins so more pins needed ,so for a solution i am thinking to connect it to microcontroller and transfer the datas in to that and controlling the motors as we have 33 io pins in pic16f877a .
clarify me the below points,
1) what is modbus protocol ??
2) is it possible to convert from modbus to rs232 protocol to communicate in PIC.
3) will it be huge cost in it,or is there any other solution for doing this project ??
i have to do a project by using PLC and PIC16F877A,
the project is to transfer the datas from PLC CONTROLLER to PIC16F877A by using MODBUS protocol in PLC,and based on that datas stepper motors have to work..
the reason for doing this project is that my actual cost for interfacing 246 stepper motor in PLC is huge as each motor occupies 4 pins so more pins needed ,so for a solution i am thinking to connect it to microcontroller and transfer the datas in to that and controlling the motors as we have 33 io pins in pic16f877a .
clarify me the below points,
1) what is modbus protocol ??
2) is it possible to convert from modbus to rs232 protocol to communicate in PIC.
3) will it be huge cost in it,or is there any other solution for doing this project ??