Exponent Operation On Floating-Point Data (Double Precision) (Expd(P)) - Mitsubishi MELSEC Q Series Programming Manual

7.12.22
Exponent operation on floating-point data
(Double precision) (EXPD(P))
EXPD(P)
EXPD
EXPDP
Setting
Data
S
D
Function
(1) Returns the exponent of the value designated by
at the device designated by
(2) Exponent operations are calculated taking the base (e) to be "2.71828".
(3) When the operation results in -0 or an underflow, the result is processed as 0.
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 value of the specified device is not in the following range:
0,2
• The value of the designated device is
• The result exceeds the following range (Operation results in an overflow):
1024
2
Command
Command
: Data of which the exponential value is obtained or head number of the devices where the data is stored
S
(real number)
: Head number of the devices where the operation result will be stored (real number)
D
Internal Devices
R, ZR
Bit Word
––
––
.
D
S +3 S +2 S +1
e
(
64-bit floating-point
real number
-1022
| value of specified device | < 2
| Operation result |
High
Basic
performance
EXPD
EXPDP
J \
U \G
Bit Word
––
––
, and stores the results of the operation
S
S D +3 D +2
) (
64-bit floating-point
real number
1024
0.
EXPD(P)
Process
Redundant Universal LCPU
S D
S D
Constants
Zn Other
E
––
–– ––
D +1 D
)
(Error code: 4140)
(Error code: 4140)
(Error code: 4141)
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