Technical data

Chapter 4 Deployment Manual VIPA System 300S SPEED7
4-36 HB140E - CP - RE_343-1EX71 - Rev. 09/46
Communication connections in the user program
For the execution of connection commands at the PLC, your CPU requires
an user application. For this, exclusively the VIPA handling blocks are to be
used, which you may get as library from VIPA.
More information about the deployment of the blocks may be found in the
manual "Operation list" of the CPU.
Depending on the connection type there are blocks for Siemens
S7
connections
and Send/Receive connections.
In the following the proceeding with both connection types is described.
Larger data sets may be transferred between PLC systems based on
Siemens STEP
®
7 by means of Siemens S7 connections. Here the stations
are to be linked by Ethernet.
Using remote functions with the appropriate function block you can control
a CPU with an other CPU and switch it e.g. to STOP.
The communication connections are static, this means they are to be
configured by a connection table.
With the SPEED7 CPUs of VIPA there are two possibilities for the
deployment of the communication functions:
• Siemens S7-300 communication functions
By integration of the function blocks FB 8 ... FB 55 from VIPA you may
access the Siemens S7-300 communication functions.
• Siemens S7-400 communication functions
For the Siemens S7-400 communication functions the SFB 8 ... SFB 23
are to be used, which were integrated to the operating system of the
CPU. Here copy the interface 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.
Precondition for Siemens S7 communication is a configured connection
table in which the communication links are defined. For this e.g. WinPLC7
from VIPA or NetPro from Siemens can be used. A communication link is
specified by a connection ID for each communication partner. Use the
local
ID
to initialize the FB/SFB in the PLC from which the connection is
regarded and the
partner ID to configure the FB/SFB in the partner PLC.
Overview
User program at
Siemens S7
connections
Communication
functions
Configuring