45Connection
Echochange - Manual / Connection
45
Editing a Connection – H1 Settings
Destination MAC
For active connections, you can enter the Ethernet address of the station in the H1 network to which
you want to connect. For passive connections, you can enter 00 00 00 00 00 00 to accept any device
or a specific MAC address that must match the station's address exactly. Otherwise, it will not be
possible to establish a connection.
Own TSAP, Dest TSAP
The local TSAP (Transport Service Access Point) specified in the “Own TSAP” field indicates the
connection address in your own system that will be used to exchange data. The remote TSAP
specified in the “Dest TSAP” field indicates the connection address of the other system. In order to
be able to establish the connection, the value in the “Own TSAP” field of one system must match the
“Dest TSAP” value in the other system, i.e. they must match crosswise.
This condition can easily be met if you set the same value for the Own TSAP and Dest TSAP fields.
TSAPs have a minimum length of 2 bytes and a maximum length of 16 bytes.
CR Parameters
For S5 PG connections to Siemens CPs (i.e. when programming an S5 PLC using a Siemens S5
CP in an H1 network via echochange), the following CR parameters must be specified:
53 35 10 01 03 0F 06 0A 20 20 20 20 20 20 20 20
Background information: With ISO (H1) connections, a transport connection is established. For this
purpose, an active transport instance sends a CR TPDU (Connection Request Transport Protocol
Data Unit) signaling that it wants to connect. This CR TPDU is used to send some parameters to the
partner, such as the desired TPDU size, the TPDU format, and others. Since there is no standard CR
parameter definition, please refer to the operating instructions of the destination system to find out
which parameters you need to specify here, if any. If no information is available, do not enter any CR
parameters.
Multicast
Multicast connections are connections that are not sent to all stations but to those that have the
same multicast group (circle) number. The values range from 0 to 63. If you select a line type other
than “Multicast”, this value is not relevant.
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.
Line
In this option group, you can specify whether frames on this connection will go to all devices
(Broadcast), whether a certain group of stations should be addressed (Multicast), whether a secured
connection will be used (Normal) or whether the data will be transmitted over an unsecured
connection (Datagram). The default setting for the line type is Normal. If you plan to use other line
type settings, please get in touch with the network administrator.
Priority
The line priority can range from 0 (highest priority) to 4 (lowest priority). 0 and 1 are so-called express
priorities, 2 and 3 are normal priorities. Priority 4 is only used on rare occasions because it causes
the connection to be reestablished for each send transaction. On the other hand, if it is only used
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