Chapter 16 PLC Function Applications
MS300
(High Speed Model)
16-73
API
LN
Binary floating point number obtain logarithm
125
D
P
Bit device
Word device
16-bit command
-
-
-
-
32-bit command (9 STEP)
DLN
Continuous
execution type
DLNP
Pulse
execution type
Flag signal: none
X Y M K H KnX
KnY
KnM
T
C
D
S
*
*
*
D
*
Notes on operand usage:
Please refer to the function specifications table for each device in
series for the scope of device usage
S
: operation source device.
D
: operation results device.
Taking e =2.71828 as a base,
S
is the exponent in the EXP operation.
[
D
+1
,
D
]=EXP
[
S +1
,
S
]
Valid regardless of whether the content of
S
has a positive or negative
value. The designated register D must have a 32-bit data format. This
operation is performed using floating-point numbers, and
S
must therefore
be converted to a floating point number.
Content of operand
D
=e
S
; e=2.71828
,
S
is the designated source data
When M0 is On, the value of (D1, D0) will be converted to a binary floating
point number, which will be stored in register (D11, D10).
When M1 is On, the EXP operation is performed on the exponent of (D11,
D10); its value is a binary floating point number stored in register (D21,
D20).
M0
M1
DFLT D0 D10
DLN D10 D20
Содержание VFD11AMS21AFSHA
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Страница 27: ...Chapter 4 Wiring MS300 High Speed Model 4 6 4 2 System Wiring Diagram...
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