Mitsubishi Electric M800VW Series Programming Manual page 408

M800V/M80V Series PLC Programming Manual (1/2)
8 Function Instructions
8.11 Special Function Instructions
 Functions
POW
 Raises the 32-bit floating-point real number designated by (S1) to the power of the 32-bit floating-point real number desig-
nated by (S2), and stores the operation result at the device designated by (D).
S2+1 S2
S1+1 S1
Exponentiation recipient data
S1+1 S1 × S1+1
The instruction raises
S1+1
32-bit floating-point real number
 The following values can be designated and stored by S1 and S2.
-126
0, 2 ≤ | Designated value (stored value) | < 2
 When the operation results in "-0" or an underflow occurs, the operation result is processed as "0".
 When setting input values from programming tools, rounding errors may occur.
For precautions when setting input values from programming tools, refer to "6.3.4 Single/Double-Precision Real Number
Data".
 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 designated device value is not within the following range. (Error code: 35)
-126
0, 2 ≤ | Designated value (stored 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
Exponentiation data
D+1 D
× ......... ×
S1
S1+1
to
S1 S2+1
32-bit floating-point real number
128
128
128
×
S1 S1+1 S1
th power.
S2
387 IB-1501667-B