Mitsubishi Electric M800VW Series Programming Manual page 426

M800V/M80V Series PLC Programming Manual (1/2)
8 Function Instructions
8.11 Special Function Instructions
 Operation errors
 In the following cases, an arithmetic error occurs, the error flag (SM0) turns ON, and an error code is stored at SD0.
- The value designated by (S) is a negative number. (Error code: 34)
- The value designated by (S) is "0". (Error code: 34)
- The designated device value is not within the following range. (Error code: 35)
-126
0, 2 ≤ | Designated device value | < 2
- The designated device value is "-0", unnormalized number, nonnumeric, or ± ∞ . (Error code: 35)
- The operation result exceeds the following range. (When an overflow occurs) (Error code: 36)
| Operation result | < 2
 Program example
 The following program calculates the common logarithm of the 32-bit floating-point real number data at D600 and D601
when M0 turns ON, and stores the operation result at D123 and D124.
[Ladder mode]
M0
0
7
Log
128
128
EMOV E2.806 D600
LOG10 D600 D123
END
[Operation]
D601 D600
2.806
10
[List mode]
Steps Inst. Device
0 LD M0
1 EMOV E2.806
D600
3 LOG10 D600
D123
7 END
D124 D123
0.448088
405 IB-1501667-B