CSE-H21 User’s Manual Ver. 1.2
Sollae Systems Co., Ltd.
- 32 -
http://www.sollae.co.kr
5
Communication Mode
5.1
Introduction
Normal communication mode is suitable for the purpose of using CSE-H21.
Normal communication mode can be classified into four modes – T2S, ATC, COD, and
U2S – each of which is described in the following table.
Table 5-1 Communication Mode
Communic
ation
Mode
Protocol Connection
Need for user
Equipment Software
Modification
Configuring
environmental
variable via serial
port
Topolo
gy
T2S
TCP
Passive
Not needed
Impossible
1:1
ATC
TCP
Active
Passive
Needed
Possible
1:1
COD
TCP
Active
Not needed
Impossible
1:1
U2S
UDP
No
Connection
Not needed
Impossible
N:M
TCP protocol requires connection process. The connection is always established as 1:1 connection. At
this time, the host waiting for connection (passive connection) is called a server and the one
attempting to connect (active connection) is called a client.
On the other hand, UDP communicates by block unit without connection process. As UDP does not
require connection, numbers of hosts can communicate at the same time.
