Mitsubishi Electric 09R927, Руководство по структурному программированию

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5.6 Standard Selection Functions
164
FXCPU Structured Programming Manual
(Application Functions)
5.6.2 MAXIMUM(_E)
Outline
This function searches the maximum value among data, and outputs the maximum value.
1. Format
*1. Output variable
2. Set data
In explanation of functions, I/O variables inside ( ) are described.
Explanation of function and operation
1) This function outputs the maximum value among ANY_SIMPLE type data stored in devices specified in
and to a device specified in using the data type of data stored in devices specified in
and .
Example: When the data type is word [signed]
2) The number of pins in can be changed.
Cautions
1) Use the function having "_E" in its name to connect a bus.
2) When handling 32-bit data in structured programs, you cannot specify 16-bit devices directly, different
from simple projects. Use labels when handling 32-bit data.
You can specify 32-bit counters directly, however, because they are 32-bit devices.
Use global labels when specifying labels.
FX
3U(C)
FX
3G
FX
2N(C)
FX
1N(C)
FX
1S
FX
U
/FX
2C
FX
0N
FX
0(S)
Function name
Expression in each language
Structured ladder ST
MAXIMUM
MAXIMUM(_IN,_IN);
Example:
D20:=
MAXIMUM(D0,D10);
MAXIMUM_E
MAXIMUM_E(EN,_IN,_IN,Output
label);
Example:
MAXIMUM_E(X000,D0,D10,D20);
Variable Description Data type
Input
variable
EN Execution condition Bit
_IN (
…
)
Compared data, or word device which stores such data ANY_SIMPLE
Output
variable
ENO Execution status Bit
*1 ( )
Word device which will store the maximum value ANY_SIMPLE
MAXIMUM
*1 D20 D0 _IN
_IN D10
MAXIMUM_E
EN ENO
*1 D20
X000
D0 _IN
_IN D10
s1
d
s1 s2 d s1
s2
MAXIMUM
_IN
_IN
1234
5678
5678
Word [signed] data
Word [signed] data
Word [signed] data
s