Mitsubishi MELSEC Q Series Programming Manual page 251

Operation Error
(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and
an error code is stored into SD0.
• The contents of the designated device or the result of the addition are not "0", or not within
the following range:
-126
0, 2
(For the Basic model QCPU, High Performance model QCPU, Process CPU, Redundant
CPU)
• The value of the specified device is
(For the Basic model QCPU, High Performance model QCPU, Process CPU, Redundant
CPU)
*2: There are CPU modules that will not result in an operation error if
Refer to Section 3.2.4 for details.
• The result of addition and subtraction exceeds the following range. (The overflow occurs.)
(For the Universal model QCPU, LCPU)
128
2 | Result of addition and subtraction |
• The value of the specified device is
(For the Universal model QCPU, LCPU)
Program Example
(1) The following program adds the 32-bit floating decimal point type real numbers at D3 and D4
and the 32-bit floating decimal point type real numbers at D10 and D11 when X20 goes ON,
and outputs the result to R0 and R1.
[Ladder Mode]
[Operation]
D4 D3
5961.437
(2) The following programs subtracts the 32-bit floating decimal point type real numbers at D20
and D21 from the 32-bit floating decimal point type real numbers at D11 and D10, and stores
the result at D30 and D31.
[Ladder Mode]
[Operation]
D11 D10
97365.203
| Contents of designated device | < 2
D11 D10
12003.200
D21 D20
76059.797
128
*2
0.
0 is specified.
0, unnormalized number, nonnumeric, and ±
[List Mode]
Instruction
Step
R1 R0
17964.637
[List Mode]
Step Instruction
D31 D30
21305.406
E+(P),E-(P)
(Error code: 4100)
(Error code: 4100)
(Error code: 4141)
.
(Error code: 4140)
Device
Device
6-49
1
2
3
4
4
6
7
8