536
LOGD, LOGDP
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.
Program Example
(1) The following program seeks the natural logarithm of the value "10" set by D50, and stores the result at D30 to D33.
[Ladder Mode]
[List Mode]
[Operation]
Error
code
Error details
Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4100
The value specified in is negative.
The value specified in is 0.
–– –– –– ––
4140
The specified device value is not within the following range:
0, 2
-1022
| Specified device value | < 2
1024
The specified device value is -0.
–– –– –– ––
4141
The operation result exceeds the following range (when an overflow
occurs):
2
1024
| Operation result |
–– –– –– ––
S
S
Sets data used for natural logarithm
operation ( ).
Converts the operation data into a 64-bit
floating-point real number ( ).
Executes natural logarithm operation ( ).
1
2
3
Step Instruction Device
10
64-bit floating-point
real number
64-bit floating-point
real number
D50
MOV
b15 b0
BIN value
10
Conversion to
floating-point
FLTD
LOG operation
LOGD
D41
10
D40D43D42
D31
2.302585
D30D33 D32
1
2
3
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