Chapter 4 Analog Input/Output Module AH06XA
4-9
3. Average
Digital values are averaged. The number by which the sum of several digital values is
divided is between 1 and 100. The sampled values are taken as a queue, and the length of
the queue is N. Each time a new sampled value is put at the end of the queue, an original
value at the start of the queue is removed. The N values are averaged so that the periodic
noise is suppressed.
4. Scale range
The analog input mode of a channel has a corresponding digital range, that is, an analog
range corresponds to a digital range. For example, if the analog range is -10V~10V and the
digital range is -10.0~10.0, the analog values -10 V~10 V correspond to the digital values
-10.0~10.0.
5. Disconnection detection
Only if the analog rang is 4 mA~20 mA or 1 V~5 V does the disconnection detection function.
If a module which can receive inputs ranging from 4 mA to 20 mA or from1 V to 5V is
disconnected, an input signal will exceed the range of inputs which can be received by the
hardware, and the module will give an alarm or a warning. Please refer to the description
below for more information.
6. Channel detection
If an input signal exceeds a range of inputs which can be received by hardware, an error
message appears. Please refer to section 4.2.1 for more information.
a. Giving alarms or warnings
The procedure below explains how to set a module so that it gives an alarm or a warning.
Rated input range
10.0 -10.0
Analog value
Scale range
-10 V
10 V
Digital value
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