Siemens SIMATIC CP 340 User Manual

Communication using function blocks
6.2 Overview of the Function Blocks
PtP coupling and configuration of CP 340
104 Manual, 04/2011, A5E00369892-03
6.2 Overview of the Function Blocks
Introduction
The S7-300 programmable controller provides you with a number of function blocks which
initiate and control communication between the CPU and the CP 340 communications
processor in the user program.
Function Blocks / Functions of the CP 340
The table below shows the function blocks / functions of the CP 340 and their meanings.
Table 6- 1 Function Blocks / Functions of the CP 340
FB/FC Meaning
FB 2
P_RCV
The P_RCV function block allows you to receive data from a communication
partner and store it in a data block.
FB 3
P_SEND
The P_SEND function block allows you to send all or part of a data block to a
communication partner.
FB 4
P_PRINT
The P_PRINT function block allows you to output a message text containing up
to 4 variables to a printer.
FC 5
V24_STAT
The V24_STAT function allows you to read the signal states at the RS 232C
interface of the CP 340-RS 232C.
FC 6
V24_SET
The V24_SET function allows you to read the signal states at the RS 232C
interface of the CP 340-RS 232C.
Scope of Supply and Installation
The progam example of the CP 340, the function blocks and the configuration tool CP 340:
Point-to-Point Communication, Parameter assignment and this manual are available on a
CDROM.
The program examples are installed together with the parameterization interface. After
installation, the function blocks are stored in the following library:
CP340
To open the library, open SIMATIC Manager of STEP 7, and then select File > Open >
Library under CP PtP\CP 340\Blocks.
For working with the function blocks, you have to copy the required function block in your
project.

Siemens SIMATIC CP 340 Specifications

General

Brand	Siemens
Model	SIMATIC CP 340
Category	Computer Hardware
Language	English