VIPA CP 240 RS232, Manual

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Manual VIPA System 200V Chapter 4 CP 240 - serial
HB97E - CP - Rev. 11/30 4-3
Fast introduction
The communication processors CP 240 enable the serial process
connection to different destination or source systems. Depending on the
module they are provided with an RS232 or an RS485 interface
respectively an RS422/485 interface.
The CP 240 modules are supplied with operating voltage via the back
plane bus.
For the internal communication the VIPA FCs are to be used. Here the data
is transferred with a maximum block size of 12Byte.
For the project engineering of the CP 240 together with a CPU 21x in the
Siemens SIMATIC Manager, the inclusion of the GSD VIPA_21x.gsd is
required. To enable the CP 240 to communicate with the CPU, a hardware
configuration for the system must always be executed.
A general description for the project engineering of the CP 240 is to be
found in the chapter "Project engineering".
For the parameterization you may send 16Byte parameter data to the CP
that are differently assigned depending on the chosen protocol.
The parameterization happens via the hardware configuration in the
Siemens SIMATIC Manager by including a protocol specific CP 240.
After the inclusion of the GSD the CP 240 is available with the following
protocols:
•
ASCII
•
STX/ETX
•
3964(R) and RK512
•
Modbus (master, slave)
The serial communication happens via the deployment of handling blocks
in the PLC user application. These handling blocks may be downloaded
from ftp.vipa.de or received as part of the CD-ROM VIPA "ToolDemo".
Depending on the protocol the following handling blocks are used:
ASCII STX
3964
RK512 Modbus FC Name
x x x FC0 SEND_ASCII_STX_3964
x x x FC1 RECEIVE_ASCII_3964
x FC2 FETCH_RK512
x FC3 SEND_RK512
x FC4 S/R_ALL_RK512
x x x FC9 SYNCHRON_RESET
x FC11 ASCII_FRAGMENT
Note!
A communication with SEND and RECEIVE blocks is only possible if the
parameter ANL of the SYNCHRON block has been set in the start-up-OB
before.
Overview
Parameters
Protocols
Communication