Hi gents
I have weintek HMI (MT6070IH) and s7-200 plc cpu 224 and vfd which supports rs485 modbus rtu communication.
The plc has 2 ports, one port will be connected to pc for online simulation while machine is running.
I need to connect the other port to both Hmi and vfd at the same time.
the hmi support ppi protocol and vfd does not.
Should I use microwin modbus control function to switch port communication protocol every time to communicate with vfd and back to ppi to communicate with hmi?, or is there any other way to do it?
can it be done this way, or its not save maybe will get communication error between plc and hmi.
i appreciate any idea you could sup
best regards
I have weintek HMI (MT6070IH) and s7-200 plc cpu 224 and vfd which supports rs485 modbus rtu communication.
The plc has 2 ports, one port will be connected to pc for online simulation while machine is running.
I need to connect the other port to both Hmi and vfd at the same time.
the hmi support ppi protocol and vfd does not.
Should I use microwin modbus control function to switch port communication protocol every time to communicate with vfd and back to ppi to communicate with hmi?, or is there any other way to do it?
can it be done this way, or its not save maybe will get communication error between plc and hmi.
i appreciate any idea you could sup
best regards