Mitsubishi MELSEC Q Series Programming Manual page 255

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:
-1022
0, 2
• The value of the specified device is
• The result of addition/subtraction exceeds the following range (Operation results in an
overflow):
1024
2
Program Example
(1) The following program adds the 64-bit floating decimal point type real numbers at D3 to D6
and the 64-bit floating decimal point type real numbers at D10 to D13 when X20 goes ON,
and outputs the result at R0 to R3.
[Ladder Mode]
[Operation]
D6 D5
5961.437
(2) The following programs subtracts the 64-bit floating decimal point type real numbers at D20
to D23 from the 64-bit floating decimal point type real numbers at D10 to D13, and stores the
result at D30 to D33.
[Ladder Mode]
SM
400
[Operation]
D13 D12 D11
97365.203
| Contents of designated device | < 2
| Result of operation |
D4 D3 D13 D12 D11
12003.200
10 20
D10 D23 D22 D21
76059.797
1024
0.
[List Mode]
Step Instruction
D10 R3 R2 R1
17964.637
[List Mode]
Instruction
Step
30
D20 D33 D32 D31 D30
21305.406
ED+(P),ED-(P)
(Error code: 4140)
(Error code: 4140)
(Error code: 4141)
Device
R0
Device
SM 400
20 30
6-53
1
2
3
4
4
6
7
8