If Statement Operators; Imath Operators - Siemens SIMATIC VPU200 Programming Manual

Table 6-5 IF Statement Operators
When these operators are used in an IF–ELSE statement a 1 will be
returned if the operator expresses a true relationship; otherwise a 0 will be
returned.
The IMATH Operators. The IMATH operators are different from those
used in MATH and IF statements. These operators should not be confused
with the others as an error will result if the operators for one type of
statement are used in a different type of statement. Also, no real variables
or constants can be used with IMATH operators or the IMATH command.
The operators which are supported for integer math are the following:
Table 6-6 IMATH Operators
SIMATIC VPU200/565 Programming Manual Programming Special Functions 6-21