Operand Areas; Circuit Diagram Conversion - Siemens S5-100U User Manual

S5-100U
7.1.2

Operand Areas

The STEP 5 programming language has the following operand areas:
I (inputs)
Q (outputs)
F (flags)
D (data)
T (timers)
C (counters)
P (peripherals)
K (constants)
OB, PB, SB
FB, DB (blocks)
Refer to Appendix A for a listing of all operations and operands.
7.1.3

Circuit Diagram Conversion

If your automation task is in the form of a circuit diagram, you must convert it to STL, CSF, or LAD.
EWA 4NEB 812 6120-02
Interfaces from the process to the programmable controller
Interfaces from the programmable controller to the process
Memory for intermediate results of binary operations
Memory for intermediate results of digital operations
Memory for implementing timers
Memory for implementing counters
Interfaces from the process to the programmable controller
Defined numeric values
Program structuring aids
Introduction to Step 5
7-3