Manual VIPA CPU 21x Chapter 4 Deployment of the CPU 21x-2BT10 with TCP/IP
HB103E - Rev. 05/45 4-15
Communication possibilities of the CP
The internal CP of the CPU 21x-2BT10 is directly connected to the CPU via
a Dual-Port-RAM. The CPU manages the data exchange with the VIPA
handling blocks AG_SEND (FC5) and AG_RECV (FC6).
The communication via the according protocols are controlled by
connections that are parameterized in the Siemens project engineering tool
NetPro and that may be transferred into the CPU via MMC, MPI or directly
via Ethernet.
For the transfer via Ethernet, your CP must be connected to Ethernet with
valid IP parameters. The assignment takes place either using the
corresponding menu item of the Siemens SIMATIC Manager or via a
minimum project where the IP parameters are defined. This project can be
transferred to the CPU via MMC or MPI.
CPCPU
Connections
configured
with NetPro
Ethernet
Application
program
(SEND, RECEIVE)
System 200V
CPU 21xNET
Frames
CPU 21xNET
Ethernet
dditional interfaces
Daten
HTBs
Frames
Frames
System 300S
CPU 31xSN/NET
Switch
The CP supports the following communication types:
• PG/OP communication
• Configurable connections
The PG/OP communication serves the loading of programs and
configuration data, for test and diagnostic functions as well as for operating
and monitoring a plant. Here you may access the CPU online via the CP
(Ethernet).
With CP firmware version 1.7.4 and up a simultaneous access of up to 32
participants is possible. Please note for each PG and OP communication 1
connection is reserved.
Communication
between CP 243
and CPU
Communication
types
PG/OP
communication