Hello,
Thank you guys for the replies.
My personal experiance that if I use ACK while I save datas in EEPROM which is longer than 2mS the ACK_TIMER is better. If I do not reply within 2mS the controller can ask me where am I (with e.g. GET_STATUS) and it can recognise false that I'm no more on the line.
Regards,
Sandor