P
ar
t
2: C
omman
d
s
Moog Animatics SmartMotor™ Developer's Guide, Rev. L
Page 475 of 909
IF formula
Conditional Program Code Execution
APPLICATION:
Program execution and flow control
DESCRIPTION:
IF
formula
...ENDIF control block
EXECUTION:
Immediate
CONDITIONAL TO:
Value of
formula
after the IF statement
LIMITATIONS:
Requires corresponding ENDIF; can be executed only from
within user program
READ/REPORT:
N/A
WRITE:
N/A
LANGUAGE ACCESS:
N/A
UNITS:
N/A
RANGE OF VALUES:
N/A
TYPICAL VALUES:
N/A
DEFAULT VALUE:
N/A
FIRMWARE VERSION:
5.x and later
DETAILED DESCRIPTION:
CAUTION:
Extensive use of IF statements and GOTO branches can quickly
make your programs impossible to read or debug. Learn to organize your code
with one main loop using a GOTO and write the rest of the program with
subroutines (GOSUB). For details, see GOSUB(label) on page 463.
The IF statement provides a method for an executing program to choose between alternate
execution paths at runtime. In its simplest form, the IF control block consists of:
IF
(formula) 'Evaluates as nonzero
'Run the code below the "IF" command
ENDIF
NOTE:
Every IF structure must be terminated with an ENDIF.
Formula is a test condition — both mathematical comparisons and Boolean-logic bitwise
comparisons can be used.
l
If the result of the
formula
is any value besides 0, then it is considered true and the
code immediately following the IF
formula
statement is executed.
l
If the result of
formula
is 0, then it is considered false and execution skips the code
following IF
formula
. When false, execution skips to the next available ELSE, ELSEIF or
ENDIF command.
The following table shows various forms of IF formulas and their descriptions:
Part 2: Commands: IF formula
