Technical data

Manual VIPA System 300S SPEED7 Chapter 4 Deployment
HB140E - CP - RE_343-1EX71 - Rev. 09/46 4-7
Basics - Protocols
Protocols define a set of instructions or standards that enable computer to
establish communication connections and exchange information as error
free as possible.
A commonly established protocol for the standardization of the complete
computer communication is the so-called ISO/OSI layer model, a model
based upon seven layers with rules for the usage of hardware and software
(see ISO/OSI reference model above).
The Ethernet CP 343S-NET - SPEED-Bus uses the following protocols:
• Siemens S7 connection
• TCP/IP
• UDP
• RFC1006 (ISO on TCP)
• ISO transport (once H1)
The protocols are described in the following:
With the Siemens S7 connection large data sets may be transferred
between PLC systems based on Siemens STEP
®
7. Here the stations are
connected via Ethernet.
Besides the communication connection a CPU may be controlled by an
other CPU by means of the remote functions with the appropriate function
block to set these e.g. to STOP.
Precondition for the Siemens S7 communication is a configured connection
table, which contains the defined connections for communication.
Here WinPLC7 from VIPA or NetPro from Siemens may be used.
• A communication connection is specified by a connection ID for each
connection partner.
• The acknowledgement of the data transfer is established from the
partner station at level 7 of the ISO/OSI reference model.
• At the PLC side FB/SFB VIPA handling blocks are necessary for data
transfer for the Siemens S7 connections.
Note!
More about the usage of the FB/SFB VIPA handling blocks concerning the
S7 connections may be found in the manual "Operation list" of the CPU.
Overview
Siemens S7
connections
Properties