Mitsubishi MELSEC iQ-F FX5 series Programming Manual page 177

DSUB(P)(_U)
These instructions subtract the 32-bit binary data in the device specified by (s1) and the 32-bit binary data in the device
specified by (s2), and store the result in the device specified by (d).
Ladder diagram
(s1) (s2) (d)
Setting data
■Descriptions, ranges, and data types
Operand Description
(s1) DSUB(P) Subtrahend data or the head device where the
data to be subtracted from another is stored
DSUB(P)_U
(s2) DSUB(P) Subtrahend data or the head device where the
data to be subtracted from another is stored
DSUB(P)_U
(d) DSUB(P) Head device for storing the operation result
DSUB(P)_U
■Applicable devices
Operand Bit
X, Y, M, L, U\G T, ST,
SM, F, B, SB
 
(s1)
 
(s2)
 
(d)
Processing details
• These instructions subtract the 32-bit binary data in the device specified by (s1) and the 32-bit binary data in the device
specified by (s2), and store the subtraction result in the device specified by (d).
(s1)
(s1)+1 (s2)+1
··· ··· ···
b31 b16 b15 b31
b0
123456 (BIN)
567890 (BIN) -
■Relationship between the flag operation and the sign (positive or negative) of a numeric value
Device Name
SM700, SM8022 Carry
SM8020 Zero
SM8021 Borrow
The most significant
bit of data becomes "1".
Zero Flag
-2, -1, 0, -2147483648
Borrow flag
Word
T, ST, C, D,
C, LC W, SD, SW, R
 
 
 
(s2)
(d)+1
··· ···
b16 b15 b31 b16 b15
b0
444434 (BIN)
Description
When the operation result exceeds the upper limit of the data setting range, the carry flag is turned ON.
When the operation result is 0, the zero flag is turned ON.
When the operation result is less than the lower limit of the data setting range, the borrow flag is turned ON.
The most significant
bit of data becomes "0".
-1, 0, 1
Zero Flag
Structured text
ENO:=DSUB(EN,s1,s2,d);
ENO:=DSUBP(EN,s1,s2,d);
Range
-2147483648 to +2147483647
0 to 4294967295
-2147483648 to +2147483647
0 to 4294967295


Double word Indirect
U\G Z LC LZ
   
   
   
(d)
···
b0
Zero Flag
2147483647, 0, 1, 2
Carry flag
ENO:=DSUB_U(EN,s1,s2,d);
ENO:=DSUBP_U(EN,s1,s2,d);
Data type Data type (label)
32-bit signed binary ANY32_S
32-bit unsigned binary ANY32_U
32-bit signed binary ANY32_S
32-bit unsigned binary ANY32_U
32-bit signed binary ANY32_S
32-bit unsigned binary ANY32_U
Constant
specification
K, H E $
   
   
   
6 BASIC INSTRUCTIONS
6.2 Arithmetic Operation Instructions
6
Others
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

175