Mitsubishi Electric M800VW Series Programming Manual page 411

M800V/M80V Series PLC Programming Manual (1/2)
8 Function Instructions
8.11 Special Function Instructions
 Functions
POWD
 Raises the 64-bit floating-point real number designated by (S1) to the power of the 64-bit floating-point real number desig-
nated by (S2), and stores the operation result at the device designated by (D).
S2+3 S2+2 S2+1 S2
S1+3 S1+2 S1+1 S1
Exponentiation recipient data
S1+3 S1+2 S1+1 S1
S1+3 S1+2 S1+1 S1
64-bit floating-point real number
 The following values can be designated and stored by S1 and S2.
-1022
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)
-1022
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
IB-1501667-B
Exponentiation data
D+3 D+2 D+1 D
S1+3 S1+2 S1+1 S1
raised to the
power of
64-bit floating-point real number
1024
1024
1024
S1+3 S1+2 S1+1 S1
is carried out.
S2+3 S2+2 S2+1 S2
390
S1+3 S1+2 S1+1 S1