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Connection
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Echochange - Manual / Connection
defined as active always and immediately tries to connect, independently of whether the connection
on the passive side is up or not.
Editing a Connection – TCP/IP Settings
Destination IP Address
When establishing an active connection, you must enter the destination IP address.
For passive connections, we recommend to enter the wildcard address (0.0.0.0).
With echochange, only IP-V4 addresses are allowed.
See also:
IP Address
Port
Port numbers are addresses that are used on the transport layer in order to address applications.
Port numbers are required for TCP and UDP connections. Ports are similar to the TSAPs used for
RFC 1006 and H1 connections. Each port number is a 16-bit number in the range from 1 to 65535.
RFC 1006 uses the fixed port number 102. If you enable the RFC 1006 check box, the port number
field is grayed out.
See also:
More detailed information on ports
Type
Here, you can specify whether your own station will actively initiate the connection attempt or will
wait passively for the destination station to establish the connection. Please make sure that different
values are selected on both sides of the connection.
The station will actively initiate the connection attempt.
The station will wait for the destination station to establish the
connection.
For the side of the echochange connection which was parameterized as active, enable the Slave
button.
TCP / UDP Protocol
The TCP (Transmission Control Protocol) is a secured protocol that uses checksums and
acknowledgments. The UDP (User Datagram Protocol) is an unsecured protocol handled via
datagram services.
Special Settings
Use PLC Header
The PLC header is used for the communication with echo devices. Use it if the data is
to be transferred in blocks in the otherwise data stream-oriented TCP protocol.
Life Data Acks
If you enable this option, payload frames without content (only headers) are transmitted to keep a
connection alive that is not used cyclically (heartbeat monitoring). Both communication partners
must support this feature.
RFC1006
If you enable the RFC1006 option, H1 frames will be “wrapped” in a TCP/IP frame for
transport. RFC 1006 is used for the communication with the Siemens S5 and S7 series
communication processors. To set the TSAPs, click the RFC1006 TSAPs button that opens the
OSI TSAP Settings dialog box.
Special Settings
This button gives access to special parameter settings for the TCP/IP connection. Usually, these
parameter settings are not required. See also Special TCP/IP Settings.
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