Omron CX-PROGRAMMER V8.1, Operation Manual

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143
ST Language Configuration
Section 5-4
type variables A=3 and B= 2, if the operation (A/B)*2 is performed, the result
of A/B is 1 (1.5 with the value below the decimal discarded), so (A/B)*2 = 2.
5-4-5 Standard Functions
Numerical Functions
Function type Syntax
Numerical Functions Absolute values, trigonometric functions, etc.
Arithmetic Functions Exponential (EXPT)
Data Type Conversion Functions Source_data_type _TO_ New_data_type ( Variable_name )
Number-String Conversion Functions Source_data_type _TO_STRING ( Variable _ name )
STRING_TO_ New_data_type ( Variable _ name )
Function Argument data type Return value
data type
Description Example
ABS ( argument ) INT, DINT, LINT,
UINT, UDINT, ULINT,
REAL, LREAL INT, DINT, LINT,
UINT, UDINT,
ULINT, REAL,
LREAL Absolute value [ argu-
ment ]
a: = ABS (b)
(*absolute value of variable
b stored in variable a *)
SQRT ( argument ) REAL, LREAL REAL, LREAL Square root:
√
argument
a: = SQRT (b)
(*square root of variable b
stored in variable a *)
LN ( argument ) REAL, LREAL REAL, LREAL Natural logarithm: LOG
e
argument
a: = LN (b)
(*natural logarithm of vari-
able
b stored in variable a *)
LOG ( argument ) REAL, LREAL REAL, LREAL Common logarithm:
LOG
10
argument
a: = LOG (b)
(*common logarithm of vari-
able
b stored in variable a *)
EXP ( argument ) REAL, LREAL REAL, LREAL
Natural exponential: e
ar-
gument
a: = EXP (b)
(*natural exponential of vari-
able
b stored in variable a *)
SIN ( argument ) REAL, LREAL REAL, LREAL Sine: SIN argument a: = SIN (b)
(*sine of variable b stored in
variable a *)
COS ( argument ) REAL, LREAL REAL, LREAL Cosine: COS argument a: = COS (b)
(*cosine of variable b stored
in variable a *)
TAN ( argument ) REAL, LREAL REAL, LREAL Tangent: TAN argument a: = TAN (b)
(*tangent of variable b stored
in variable a *)
ASIN ( argument ) REAL, LREAL REAL, LREAL
Arc sine: SIN
−
1
argument
a: = ASIN (b)
(*arc sine of variable b
stored in variable a *)
ACOS ( argument ) REAL, LREAL REAL, LREAL
Arc cosine: COS
−
1
argu-
ment
a: = ACOS (b)
(*arc cosine of variable b
stored in variable a *)
ATAN ( argument ) REAL, LREAL REAL, LREAL
Arc tangent: TAN
−
1
argu-
ment
a: = ATAN (b)
(*arc tangent of variable b
stored in variable a *)