Jetter JC-120MC, Руководство пользователя

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488 Jetter AG
10 Programming
Establishing a connection
Before data can be sent or received, a connection has to be established.
Here, the following criteria have to be discerned:
 Which transaction log (TCP or UDP) has to be used?

Is it a client or a server that has to be installed?
Function ConnectionCreate(ClientServerType:Int,
IPType:Int,
IPAddr:Int,
IPPort:Int,
Timeout:Int):Int;
Description of the function parameters:
Parameter Value Comment
ClientServerType
Client = 1 =
CONNTYPE_CLIENT
Server = 2 =
CONNTYPE_SERVER
IPType
UDP/IP = 1 =
IPTYPE_UDP
TCP/IP = 2 =
IPTYPE_TCP
IPAddr
Valid IP address Required only for TCP/IP
client
IPPort
Valid IP port number Will be ignored for UDP/IP
client
Timeout
0 ... 1,073,741,824 [ms] 0 = infinitely
If the return value was positive, the connection could be established. If the
returned value was negative, an error occurred and the connection could not
be established.
Return value
> 0 A positive return value must be stored in a variable. It must
be made available as a handle at activating the functions
Send data
,
Receive data
, and
Terminate connection
.
-1 Error during connection set-up
-2 Internal error
-3 Invalid parameter
-8 Timeout
Introduction
Function declaration
Function parameters
Return value