Adam ADAM-3600-C2G, Руководство пользователя

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37 ADAM-3600 Series User Manual
Chapter 4
A
dvantech
iRTU
Studio
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