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8 Analog I/O Slave Unit
GX-series EtherCAT Slave Unit User’s Manual
8
-3 F
unc
tion
of
th
e
Anal
og In
pu
t Slave U
n
it
8
8-3-
1
AD Conversion
A
vailable Point
S
e
tting
8-3 Function of the Analog Input Slave
Unit
An Analog Input Slave Units has the following convenient functions, in addition to the I/O signal
processing.
 Purpose
This function sets to skip processing unused points, and enhances the speed of refresh cycles of
analog input.
 Details of functions
Normally in this Unit, the values for the four input points are converted in sequence. The setting can
be changed, so that unused points are not converted.
By reducing the number of conversion points, the conversion cycle speed is increased.
Whether AD conversion is enabled or disabled is settable for each point. (Default setting: Enable for
all channels)
Notes Regardless of this setting, an Analog Input Slave Unit uses four points of data allocation
area.
Set by SDO communications.
The target index is 3100 hex.
For the set values, refer to the information in the corresponding index of "Appendix A-1 Object
Dictionary" in Page A - 43.
The table below shows the analog conversion time by the number of AD conversion available points.
8-3-1 AD Conversion Available Point Setting
Overview of functions
Setting method
Enabled
channel
Conversion time [
μ
s]
1 point 500
2 points 1000
3 points 1500
4 points 2000