X20 system modules • Temperature modules • X20ATC402
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X20 system User's Manual 3.10
4.31.8.9.5 Module configuration
The X20ATC402 is an I/O module for temperature measurement. It has six non electrically isolated channels.
The module requires a 16-pin standard terminal or the 16-pin terminal with 2 integrated PT1000 inputs for temper-
ature compensation. The remaining six channels can be equipped with thermocouples and record the difference
in temperature between the reference point (e.g. the terminal) and the actual measurement point.
4.31.8.9.5.1 I/O update time
The analog/digital converter must convert up to eight values. After switching between two inputs there are four
measurements in order to obtain a meaningful value. Since not all inputs need to be used, the actual I/O update
time may vary greatly.
The following formula can be used to calculate the I/O update time:
Conversion rate * 4 * (number of converted compensation number of converted temperature differences)
4.31.8.9.5.2 InputFilter
Designations (pChannelName):
Cfo_InputFilter
The "Filter" register allows the user to set the conversion interval for the analog/digital converter.
Data type
Values [msec]
UINT
0…65535
Information:
The lower the conversion interval is set, the more precisely the value can be converted. However, this
also increases the I/O update time.
The following formula applies:
Conversion rate = (4920000/1024) * InputFilter
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