Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 252

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Processing details
• These instructions subtracts the 32-bit binary data in the device specified by (s2) from the 32-bit binary data in the device
specified by (s1), and store the operation result in the device specified by (d).
(s1)
(s1)+1
b31
b16 b15
b0
···
···
567890 (BIN)
-
• If an underflow occurs in the result, the carry bit is ignored. In this case, SM700 does not turn on.
[D-(P) instruction]
(s1)
(s1)+1
b31
b16 b15
b0
···
···
1234567890 (BIN)
-
(s1)
(s1)+1
b31
b16 b15
b0
···
···
-1234567890 (BIN)
-
[D-(P)_U instruction]
(s1)
(s1)+1
b31
b16 b15
···
···
b0
3456789012 (BIN)
-
Operation error
There is no operation error.
6 BASIC INSTRUCTIONS
250
6.2 Arithmetic Operation Instructions
(s2)
(s2)+1
(d)+1
b31
b16 b15
b0
b31
···
···
···
123456 (BIN)
444434 (BIN)
(s2)
(s2)+1
(d)+1
b31
b16 b15
b0
b31
···
···
···
-987654321 (BIN)
74738564 (BIN)
(s2)
(s2)+1
(d)+1
b31
b16 b15
b0
b31
···
···
···
987654321 (BIN)
-74738563 (BIN)
(s2)
(s2)+1
(d)+1
b31
b16 b15
b31
···
···
b0
-1234567890 (BIN)
396389607 (BIN)
(d)
b16 b15
b0
···
(d)
b16 b15
b0
···
(d)
b16 b15
b0
···
(d)
b16 b15
···
···
b0

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