Try to disable time out monitoring in both MMC100.2 (services->interface setting) and maybe in WinPCIN if you use Siemens sw to transfer into 

Tyamad

Hello.

I have a CNC(Controller : 840D , MMC100.2)

While running DNC (Execution from ext.) a MPF file is showss

time out error after working a short time ( about 1000 blocks)

It is in the event that : The MPF file is sent completely

as i sent a MPF file through DATA IN.

Would you please guide me?

sincerely yours.