Jetter JVM-407B-HMI, User Manual

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224 Jetter AG
10 Programming
If a client is to establish a TCP/IP connection to a server, you can invoke the
function and assign the return value of a variable for further evaluation as
follows:
Result := ConnectionCreate(CONNTYPE_CLIENT,
IPTYPE_TCP,
IP#192.168.75.123 ,
46000,
T#10s );
The task stops at the program line until the connection is established or the
specified timeout has elapsed. This function is processed in the following
steps:
Step Description
1
The device JVM-407B tries to establish a TCP/IP connection via port
46000 to the network client with IP address 192.168.75.123.
2 If ... ... then ...
the network client has accepted the
connection,
the function is terminated and a
positive value is returned as handle
for further access to the connection.
the connection could not be
established and the timeout of 10
seconds has not elapsed yet,
step 1 is carried out.
an error has occurred or the
timeout has elapsed,
the function is terminated and a
negative value is returned.
If a server is to establish a TCP/IP connection to a client, you can invoke the
function and assign the return value of a variable for further evaluation as
follows:
Result := ConnectionCreate(CONNTYPE_SERVER,
IPTYPE_TCP,
0,
46000,
T#100s );
Using this function with
a TCP/IP client
Functioning principle
with a TCP/IP client
Using this function with
a TCP/IP server