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Designing a Sequential Control System based on the Example of a Drill
Requirements
To allow you to program and test the "drill" example, you require the following
hardware and software:
• Programming device/PC with
STEP 7 standard package and the S7-Graph optional package
-
MPI connection to the programmable logic controller
-
• A programmable logic controller (in our example an S7-300) consisting of the
following: standard rail, 24V power supply, CPU 314 and a digital input/output
module (8DI + 8DO)
• As an alternative to the PLC: The "PLC Simulation" S7 optional package
Procedure for Creating a Sequential Control System
The flow diagram illustrates the procedure for creating the sequential control
system for the drill example:
Specify structure of sequencer
and define signals for system
Create drill project in the
SIMATIC Manager
Create sequencer:
•
create and open S7 Graph FB1 in
the SIMATIC Manager
•
Program sequencer
Program OB1 with FB1 call and
corresponding instance DB (DB1)
Download sample program (DB1, FB1,
OB1) to the CPU in the SIMATIC
Manager and test the sequencer
3-2
yes
Symbolic
programming
Create symbol table
no
S7-GRAPH for S7 300/400 Programming Sequential Control Systems
C79000-G7076-C526-01
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