Engineering Of The Step 7 Program; Overview - Siemens SIMATIC MV320 Manual

2 Engineering of the STEP 7 program

Engineering of the STEP 7 program
2
2.1

Overview

Introduction
The STEP 7 V17 project contains:
•
The user program for the S7 CPU with the "PtPFreeport" function block
•
The configuration and project engineering of the ET 200SP communication
module CM PtP
Note In this application example, the configuration of the ET 200SP communication
module CM PtP is carried out with the system block "Port_Config".
If you do not use the system block "Port_Config", you must set the connection
parameters of the ET 200SP CM PtP communication module in the hardware
configuration (see
Diagram
The following graphic shows the program structure of the whole STEP 7 V17
project.
Figure 2-1
Startup
OB100
Main
OB1
Program blocks
The user program of the SIMATIC S7-300 CPU consists of the following elements:
Table 2-1
Element
OB100
OB1
Reading QR Codes with SIMATIC MV320 via ET200SP CM PtP
Article ID: 109474684, V2.0,
chapter 6.2, Step 11).
PtPFreeport
FB770
•
Port_Config
•
Receive_Reset
•
Receive_P2P
Symbolic name
Startup
Main
10/2021
DataPtP
DB772
•
portConfigSettings
•
rcvPtPData
Description
Sets the communication parameters (see
Table 2-2) when the program is restarted and
enables the port configuration.
Note:
Calling "Port_Config" overwrites the settings of
the hardware configuration.
In OB1, the "PtPFreeport" function block,
including the associated instance data block,
is called cyclically.
Global
7