FX3U 60MR with TP1200 Communication Drops

[faseeh 0]

Hi Everyone,

I have FX3U 60MR PLC and TP1200 Comfort HMI, communication perameters on HMI are 9600,7,even,1 stop bit. The problem we are facing is, communication drops after approximately 12 hrs. Analog tags become ### and HMI also dont respond to digital change in plc. Then we Power Reboot HMI and communcation get established. After few hours, same error occurs. we have change the HMI. But issue remained same. HMI is programmed through TIA 13 and TIA 14. HMI also dont allow to change communication parameter. Any one can help please?

[Crossbow 294]

Should be in the Siemens forum, not here.  The HMI is clearly losing communications.