S5-95F
Introduction to STEP 5
7.1.2
Operand Areas
The STEP 5 programming language has the following operand areas.
I
(inputs)
Interfaces from the process to the programmable controller
Q
(outputs)
Interfaces from the programmable controller to the process
F
(flags)
Memory for intermediate results of binary operations
D
(data)
Memory for intermediate results of digital operations
T
(timers)
Memory for implementing timers
C
(counters)
Memory for implementing counters
P
(peripherals)
Interfaces from the process to the programmable controller
K
(constants)
Defined numeric values
OB, PB, SB
FB, DB
(blocks)
Program structuring aids
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 6210-02
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