Lenze E94P PositionServo with MVOB - Manual (Page 46)

44 L PM94H201B_13xxxxxx_EN
Programming
2.9 Control Structures
Control structures allow the user to control the flow of the program’s execution. Most of the control and flexibility of any
programming language comes from its ability to change statement order with structure and loops.
2.9.1 IF Structure
The flowchart and code segment in Figure 17 illustrate the use of the IF statement. The “IF” statement is used to execute
an instruction or block of instructions one time if a condition is true. The simplified syntax for the IF statement is:
IF condition
…statement(s)
ENDIF
…statements
IF IN_A2
OUT2 = 1
MOVED 3
ENDIF
..statements
Start
Set Output 2 ON
Move Distance 3
units
End
Yes
NO
Input A2 ON?
Figure 17: IF Code and Flowchart
IF/ELSE
The flowchart and code segment in Figure 18 illustrate the use of the IF/ELSE instruction. The IF/ELSE statement is
used to execute a statement or a block of statements one time if a condition is true and a different statement or block of
statements if condition is false. The simplified syntax for the IF/ELSE statement is:
IF <condition>
…statement(s)
ELSE
…statement(s)
ENDIF
…statements
IF IN_A2
OUT2=1
MOVED 3
ELSE
OUT2=0
MOVED 5
ENDIF
..statements
Start
Input A2 ON?
Set Output 2 ON
Move Distance 3
units
End
Yes
Set Output 2 OFF
Move Distance 5
units
No
Figure 18: IF/ELSE Code and Flowchart