Functional Mechanisms Of This Application; Program Overview - Siemens SIMATIC S7-300 Manual

3

Functional Mechanisms of this Application

Introduction
The following sections provide detailed explanations of the functionalities of the dif-
ferent scenarios
Generating and sending an SMS message
Sending an SMS message with attached coefficient
Receiving and evaluating SMS orders and
Receiving a remote query of a value.
3.1

Program overview

The figure below shows the program structure of the entire STEP 7 project.
Figure 3-1
OB 1
OB
CALL
SMS_Meld
CALL
SMS_MNG
Sending and Receiving SMS Messages with MD720-3
V 2.1, ID Number: 25545680
3 Functional Mechanisms of this Application
"SMS_sr"
"SMS_Meld"
FB 18
FB 17
+
"SMS_MNG"
FC
FC 50
SMS
Individual
library
user
block
blocks
3.1 Program overview
FC2, FC10, FC11, FC17,
FC20, FC21,FC26, FC29,
FC32, FC38, FC91
IEC
functions
CP function blocks
FB
FB
SEND RECEIVE
BLOCK BLOCK
S7 standard
library blocks
17