Advantech ADAM-3600-C2G Series User Manual page 45

The relationship among connection period, connection duration and idle time is shown in the
following picture.
Figure 4.24 Relationship among connection period, connection duration and
idle time

DTU-Four Faith PROT Protocol
Figure 4.25 DTU-Four faith PROT protocol in active connection
The extra parameters are also required in the DTU-Four faith PROT protocol.
Device Identifier: It is applied for RTU identification and it should be 16 hex.
SIM Card Number: Here are 11 card numbers.
Heart Beat Period: It specifies the sending period of heartbeat char. When it is set as 0, it
means that heart beat char is not transmitted.
Moreover, it has four kinds of chars: escape char, heart beat char, escaped heart beat char
and escaped escape char.
Escape rules:
The heartbeat character is only for heart beat packet. The heart beat char can be escaped as
< escape char > < escaped heart beat char >. The escape char can be escaped as < escape
char> < escaped escape char >. By default, the escape char is fd, the heart beat char is fe,
the escaped heart beat char is ee, and the escaped escape char is ed.
Escape rules of the sender:
fe => fd ee
fd => fd ed
Escape rules of the receiver
fd ee => fe
37 ADAM-3600 Series User Manual