Dear HMS support team,
I am facing technical issues while inter-connecting the following items by using PPI MuliMaster protocol :
- 1 x HMI WeIntek MT8071ie (Master)
- 1 x PLC Siemens S7200 SMART (Slave)
- 1 x Modem EWON Flexy 205 w/ MPI/PPI Multimaster extension card (Master)
As per my observation, the Flexy and the HMI are not able to communicate at the same time with the PLC :
- When the HMI is communicating with the PLC, the Flexy stop receiving any data.
- When the Flexy is communicating with the PLC, the HMI stop receiving any data.
If I connect only one of the item above to the PLC, everything is working fine.
The Flexy and HMI are inter-connected to the DB9 port of the PLC as follow :
Would you have any suggestion to solve this issue ?
Let me know if you need additional information.
Thanks in advance for your help.
Best regards,
Robin