5.3 Standard Arithmetic Functions
138
FXCPU Structured Programming Manual
(Application Functions)
5.3.2
SUB_E
Outline
This function performs subtraction using two values (A - B = C), and outputs the operation result.
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 performs subtraction (
-
) using word [signed]/double word [signed]/float (single
precision) data stored in devices specified in
and
, and outputs the operation result 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]
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
SUB_E
SUB_E(EN,_IN1,_IN2,Output
label);
Example:
SUB_E(X000,D0,D10,D20);
Variable
Description
Data type
Input
variable
EN
Execution condition
Bit
_IN1 (
)
Data to be subtracted or word device which stores such data
ANY_NUM
_IN2 (
)
Data for subtraction or word device which stores such data
ANY_NUM
Output
variable
ENO
Execution status
Bit
*1
(
)
Word device which will store the operation result
ANY_NUM
SUB_E
EN
ENO
*1
D20
X000
D0
_IN1
_IN2
D10
s1
s2
d
s1
s2
s1
s2
d
s1
s2
12345
-
6789
5556
(Word
[signed] data)
s2
(Word
[signed] data)
s1
(Word
[signed] data)
d
