22 Analog input module XN-322-4AI-PTNI
22.5 Diagnostics
157 XN300 slice modules 02/24 MN050002EN Eaton.com
22.5 Diagnostics
If the reading falls within the permissible measuring range and both the
range and channel diagnostics read "FALSE," the valid reading will be shown.
If the measuring range is exceeded or fallen below, but the reading still falls
within the limits for range diagnostics, the fact that the permissible
measuring range has been exceeded/fallen below will be indicated by setting
the range diagnostics' (measuring range diagnostics) status to "TRUE". In this
case, the open wire diagnostics will remain "FALSE", and a reading will be
shown.
If the reading exceeds or falls below the limits for range diagnostics, the
device will be unable to perform a measurement, just like in the event of an
cable break. In this case, the cable break diagnostics will signal the fault by
having their status set to "TRUE", while the range diagnostics will keep a
status of "FALSE". When this occurs, a value of "-30000" will be shown as the
reading.
If a channel is disabled, there will not be any measurements, and the open
wire diagnostics will indicate this with the "TRUE" status.
22.6 Filtering:
The low-pass cutoff frequency can be configured for each input channel
using the appropriate register. This cutoff frequency is specified in Hz
without any decimal places.
Values from 0 to 100 are allowed.
0: No filter. A value of 1 to 100 corresponds to 1 to 100 Hz
Example: 50 Hz low-pass cutoff frequency; register value: 50
dec
/ 32
hex
The following values are allowed:
￫
Range and open wire diagnostics must be taken into account in
order to ensure that the reading shown is being interpreted
correctly.
Low-pass cut-off frequency Register value
Filter disabled (default) 0x0000
1 Hz 0x0001
10 Hz
0x000A
25 Hz 0x0019
50 Hz 0x0032
100 Hz 0x0064
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