Mitsubishi Electric MELSEC L series, Programming Manual

Page: 240 / 298

6 - 53 6 - 53
6 IEC FUNCTIONS
6.8.4 Limiter LIMIT
LIMIT_E
The output value is controlled depending on whether the specified data is within the upper/lower limit value
(minimum/maximum output limit value) range or not.
Function definition
ANY_SIMPLE LIMIT( ANY_SIMPLE MIN, ANY_SIMPLE S1, ANY_SIMPLE MAX );
Argument
Argument Name IN/OUT Description
MIN IN Minimum output limit value
S1 IN Input value
MAX IN Maximum output limit value
Return value
Return Value Description
ANY_SIMPLE Output value
When MIN (lower limit value) > S1 (input value)
.............................................................................. Return value = MIN (lower limit value)
When MAX (upper limit value) < S1 (input value)
............................................................................ Return value = MAX (upper limit value)
When MIN (lower limit value) S1 (input value) MAX (upper limit value)
........................................................................................ Return value = S1 (input value)
Example of use
Argument Type ST Program Conversion Result Used Instruction
REAL Real4:=
LIMIT( Real1,Real2,Real3 );
LDE>= Real2 Real1
ANDE<= Real2 Real3
EMOV Real2
Real4
LDE< Real2 Real1
EMOV Real1 Real4
LDE> Real2 Real3
EMOV Real3 Real4
LDE>=,ANDE<=,EMOV,
LDE<,LDE>
INT Int4:=
LIMIT( Int1,Int2,Int3);
LD SM400
LIMIT Int1 Int3
Int2
Int4
LD,LIMIT
DINT Dint4:=
LIMIT( Dint1,Dint2,Dint3);
LD SM400
DLIMIT Dint1 Dint3
Dint2 Dint4
LD,DLIMIT
BOOL bBit4:=
LIMIT(bBit1,bBit2,bBit3);
LD bBit2
OR bBit1
AND bBit3
OUT bBit4 LD,OR,AND,OUT
STRING Str4:=
LIMIT(Str1,Str2,Str3);
LD$>= Str2 Str1
AND$<= Str2 Str3
$MOV Str2
Str4
LD$< Str2 Str1
$MOV Str1 Str4
LD$> Str2 Str3
$MOV Str3 Str4
LD$>=,AND$<=,$MOV,
LD$<,LD$>