Data Control; Upper/Lower Limit Control - Mitsubishi Electric MELSEC Q Series Programming Manual

5 MELSEC FUNCTIONS

5.19 Data Control

5.19.1 Upper/lower limit control

The output value is controlled depending on whether the specified BIN 16-bit data is within the upper/lower limit
value range or not.
Function definition
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LIMIT_MD
BOOL LIMIT_MD (BOOL EN, ANY16 S1, ANY16 S2, ANY16 S3, ANY16 D);
Argument Name
EN
S1
S2
S3
D
Remarks: The output value is controlled as described below.
When S1 (lower limit value) > S3 (input value)
......................................................... S1 (lower limit value)
When S2 (upper limit value) < S3 (input value)
.........................................................S2 (upper limit value)
When S1 (lower limit value) ≤ S3 (input value) ≤ S2 (upper limit value)
..................................................................S3 (input value)
Return Value
BOOL Execution condition
Example of use
(* When execution condition X0 turns ON, the output value is stored into Result *)
(* depending on whether or not the input value specified in iData3 is within the
(* per/lower limit value range specified in iData1 and iData 2.
LIMIT_MD (X0, iData1, iData2, iData3, Result);
Corresponding MELSEC command
LIMIT (16-bit upper/lower limit control)
IN/OUT
Execution condition (Function is executed only when the
IN
result is TRUE)
IN Lower limit value (BIN 16-bit data)
IN Upper limit value (BIN 16-bit data)
IN Input value (BIN 16-bit data)
OUT Output value (BIN 16-bit data)
For the usable data type, refer to "3.2.2
About ANY type".
Description
Description
D (output value)
D (output value)
D (output value)
*)
*)
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