In the following every relevant parameter of a Siemens S7 connection is described:
n
Local connection end point:
Here you may define how the connection is to be established. Since the Siemens
SIMATIC Manager can identify the communication options by means of the end
points, some options are already preset and may not be changed.
–
Establish an active connection:
An established connection is precondition for data transfer. By activating the
option Establish an active connection the local station establishes the connection.
Please regard not every station is able to establish a connection. Here the job is
to be made by the partner station.
–
One-way:
If activated only one-way communication blocks like PUT and GET may be used
for communication in the user program. Here the partner station acts as server,
which neither may send active nor receive active
n
Block parameters
–
Local ID:
The ID is the link to your PLC program. The ID must be identical to the ID of the
call interface of the FB/SFB VIPA handling block.
–
[Default]:
As soon as you click at [Default], the ID is reset to system generated ID.
n
Connection path:
In this part of the dialog window the connection path between the local and the
partner station may be set. Depending on the linking of the modules the possible
interfaces for communication are listed in a selection field.
–
[Address details]:
With this button a dialog window is opened, which shows address information
about the local and partner station. The parameters may also be changed.
–
TSAP:
With Siemens S7 connections a TSAP is automatically generated of the connec-
tion resource (one-way/two-way) and state of place (rack/slot respectively system
internal ID at PC stations).
–
Connection resource:
The connection resource is part of the TSAP of the local station respectively of
the partner. Not every connection resource may be used for every connection
type. Depending on the connection partner and the connection type the range of
values is limited respectively the connection resource is fix specified.
With the SPEED7 CPUs of VIPA there are two possibilities for the deployment of the
communication functions:
n
Siemens S7-300 communication functions:
By integration of the function blocks FB 12 ... FB 15 from VIPA you may access the
Siemens S7-300 communication functions.
n
Siemens S7-400 communication functions:
For the Siemens S7-400 communication functions the SFB 12 ... SFB 15 are to be
used, which were integrated to the operating system of the CPU. Here copy the inter-
face description of the SFBs from the standard library at system function block to the
directory container, generate an instance data block for each call and call the SFB
with the associated instance data block.
Siemens S7 connection -
Communication functions
VIPA System MICRO
Deployment PG/OP communication - productive
Configure Siemens S7 connections
HB400 | CPU | M13-CCF0000 | en | 16-47
151
