The table below shows an overview on the operators, which are available in AC500-S Programming Tool or in the libraries Standard.lib and Util.lib. You find there the notation for ST.
Please obtain a detailed description of usage from the appropriate appendices concerning IEC operators.
Operators in AC500-S Programming Tool:
|
in ST |
in AWL |
Mod. AWL |
Description |
|---|---|---|---|
|
' |
|
|
String delimiters (e.g. 'string1') |
|
.. [ ] |
|
|
Size of Array range (e.g. ARRAY[0..3] OF INT) |
|
: |
|
|
Delimiter between Operand and Type in a declaration (e.g. var1 : INT;) |
|
; |
|
|
Termination of instruction (e.g. a:=var1;) |
|
^ |
|
|
Dereferenced Pointer (e.g. pointer1^) |
|
|
LD var1 |
N |
Load value of var1 in buffer |
|
:= |
ST var1 |
N |
Store actual result to var1 |
|
|
S boolvar |
|
Set boolean operand boolvar exactly then to TRUE, when the actual result is TRUE |
|
|
R boolvar |
|
Set boolean operand boolvar exactly then to FALSE, when the actual result is TRUE
|
|
in ST |
in AWL |
Mod. AWL |
Description |
|---|---|---|---|
|
|
JMP label |
CN |
Jump to label |
|
<Program name> |
CAL prog1 |
CN |
Call program prog1 |
|
<Instance name> |
CAL inst1 |
CN |
Call function block instance inst1 |
|
<Fctname>(vx, vy,..) |
<Fctname> vx, vy |
CN |
Call function fctname and transmit variables vx, vy |
|
RETURN |
RET |
CN |
Leave POU and go back to caller |
|
|
( |
|
The value following the bracket is handled as operand, the operation before the bracket is not executed before the expression in the brackets. |
|
|
) |
|
Now execute the operation which has been set back |
|
AND |
AND |
N,( |
Bitwise AND |
|
OR |
OR |
N,( |
Bitwise OR |
|
XOR |
XOR |
N,( |
Bitwise exclusive OR |
|
NOT |
NOT |
|
Bitweise NOT |
|
+ |
ADD |
( |
Addition |
|
- |
SUB |
( |
Subtraction |
|
* |
MUL |
( |
Multiplication |
|
/ |
DIV |
( |
Division |
|
> |
GT |
( |
Greater than |
|
>= |
GE |
( |
Greater or equal |
|
= |
EQ |
( |
Equal |
|
<> |
NE |
( |
Not equal |
|
<= |
LE |
( |
Less or equal |
|
< |
LT |
( |
Less than |
|
MOD(in) |
MOD |
|
Modulo Division |
|
INDEXOF(in) |
INDEXOF |
|
Internal index of POU in1; [INT] |
|
SIZEOF(in) |
SIZEOF |
|
Number of bytes required for the given data type of in |
|
SHL(K,in) |
SHL |
|
Bitwise left-shift of operator in by K |
|
SHR(K,in) |
SHR |
|
Bitwise right-shift of operator in by K |
|
ROL(K,in) |
ROL |
|
Bitwise rotation to the left of operator in by K |
|
ROR(K,in) |
ROR |
|
Bitwise rotation to the right of operator in by K |
|
SEL(G,in0,in1) |
SEL |
|
Binary selection between 2 operands in0 (G is FALSE) and in1 (G is TRUE) |
|
MAX(in0,in1) |
MAX |
|
Returns the greater of 2 values |
|
MIN(in0,in1)
|
MIN |
|
Returns the lesser of 2 values in0 and in1 |
|
LIMIT(MIN,in,Max) |
LIMIT |
|
Limits the range of values (in is set back to MIN or MAX in case of exceeding the range)
|
|
in ST |
in AWL |
Mod. AWL |
Description |
|---|---|---|---|
|
MUX(K,in0,...in_n) |
MUX |
|
Selecti the Kth value out of a group of values (in0 to In_n) |
|
ADR(in) |
ADR |
|
Address of the operand in [DWORD] |
|
ADRINST() |
ADRINST()
|
|
Address of the function block instance from which you are calling that operator. |
|
BITADR(in) |
BITADR |
|
Bitoffset of the operand in [DWORD] |
|
BOOL_TO_<type>(in) |
BOOL_TO_<type> |
|
Type conversion of the boolean operand |
|
<type>_TO_BOOL(in) |
<type>_TO_BOOL |
|
Type conversion to BOOL |
|
INT_TO_<type>(in) |
INT_TO_<type> |
|
Type conversion of an INT Operand to another elementary type |
|
REAL_TO_<type>(in) |
REAL_TO_<type> |
|
Type conversion of an REAL operand to another elementary type |
|
LREAL_TO_<type>(in) |
LREAL_TO_<type> |
|
Type conversion of a LREAL operand to another elementary type |
|
TIME_TO_<type>(in) |
TIME_TO_<type> |
|
Type conversion of a TIME operand to another elementary type |
|
TOD_TO_<type>(in) |
TOD_TO__<type> |
|
Type conversion of a TOD operand to another elementary type |
|
DATE_TO_<type>(in) |
DATE_TO_<type> |
|
Type conversion of a DATE operand to another elementary type |
|
DT_TO_<type>(in) |
DT_TO_<type> |
|
Type conversion of a DT operand to another elementary type |
|
STRING_TO_<type>(in) |
STRING_TO_<type> |
|
Type conversion of a string operand to another elementary type, in must contain valid value of desired type |
|
TRUNC(in) |
TRUNC |
|
Conversion from REAL to INT |
|
ABS(in) |
ABS |
|
Absolute value of operand in |
|
SQRT(in) |
SQRT |
|
Square root of operand in |
|
LN(in) |
LN |
|
Natural logarithm of operand in |
|
LOG(in) |
LOG |
|
Logarithm of operand in, base 10 |
|
EXP(in) |
EXP |
|
Exponential function of operand in |
|
SIN(in) |
SIN |
|
Sine of operand in |
|
COS(in) |
COS |
|
Cosine of operand in |
|
TAN(in) |
TAN |
|
Tangent of operand in |
|
ASIN(in) |
ASIN |
|
Arc sine of operand in |
|
ACOS(in) |
ACOS |
|
Arc cosine of operand in |
|
ATAN(in) |
ATAN |
|
Arc tangent of operand in |
|
EXPT(in,expt) |
EXPT expt |
|
Exponentation of operand in with expt |
Elements of the standard library
|
Structured Text |
Description |
|---|---|
|
LEN(in) |
String length of operand in |
|
LEFT(str,size) |
Left inital string of given size of string str |
|
RIGHT(str,size) |
Right initial string of given size of string str |
|
MID(str,size,pos) |
Partial string of str of given size at position pos |
|
CONCAT('str1','str2') |
Concatenation of two subsequent strings |
|
INSERT('str1','str2',pos) |
Insert string str1 in string str2 at position pos |
|
DELETE('str1',len,pos) |
Delete partial string (length len), start at position pos of str1 |
|
REPLACE('str1','str2',len,pos) |
Replace partial string of lenght len by str2, start at position pos of str1 |
|
FIND('str1','str2') |
Search for partial string str2 in str1 |
|
SR |
Bistable function block is set dominant |
|
RS |
Bistable function block is set back |
|
SEMA |
FB: Software Semaphor (interruptable) |
|
R_TRIG |
FB: rising edge is detected |
|
F_TRIG |
FB: falling edge is detected |
|
CTU |
FB: Counts upv |
|
CTD |
FB: Count down |
|
CTUD |
FB: Up/down counter |
|
TP |
FB: trigger |
|
TON |
FB: on delay timer |
|
TOF |
FB: off delay timer |
|
RTC |
FB: real-time clock |
Elements of the util library
|
Element |
Description |
|---|---|
|
BCD_TO_INT |
Conversion of a byte: BCD to INT format |
|
INT_TO_BCD |
Converstion of a byte: INT to BCD format |
|
EXTRACT(in,n) |
The n-th bit of DWORD in is returned in BOOL |
|
PACK |
Up to 8 bits are packed into a byte |
|
PUTBIT |
A bit of a DWORD is set to a certain value |
|
UNPACK |
A byte is returned as single bits |
|
DERIVATIVE |
Local derivation |
|
INTEGRAL |
Integral |
|
LIN_TRAFO |
Transformation of REAL values |
|
STATISTICS_INT |
Min., max., average values in INT format |
|
STATISTICS_REAL |
Min., max., average in REAL format |
|
VARIANCE |
Variance |
|
PD |
PD controller |
|
PID |
PID controller |
|
BLINK |
Pulsating signal |
|
FREQ_MEASURE |
Measuring frequency of boolean input signal |
|
GEN |
Periodic functions |
|
CHARCURVE |
Linear functions |
|
RAMP_INT |
Limiting ascendance of descendance of the function beeing fed (INT) |
|
RAMP_REAL |
Limiting ascendance of descendance of the function beeing fed (REAL) |
|
HYSTERESIS |
Hysteresis |
|
LIMITALARM |
Watches whether input value exceeds limits of a defined range |