Advantech Adam - 4021, User Manual, Page: 185 / 286

173 ADAM-4000 Series User Manual
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7.2.3.3 $AA0H(data)
Name Set Minimum Input Signal Width at High Level command
Description Set the minimum input signal width at high level for a
specified counter/frequency module to filter the noise.
Syntax $AA0H(data)(cr)
$
is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address that you will access to.
0H is the Set Minimum Input Signal Width at High Level
command.
(data) is the minimum width at high level. The unit is in
μsec (microseconds) and its resolution is 1 μsec. The
format is a five digit integer that can range from 2 μsec to
65535 μsec. Out of range values will cause errors.
(cr) is the terminating character, carriage return (0Dh).
Response !AA(cr) if the command is valid. The addressed module
stores the value and will recognize the input signal “high”
only after the input signal continues “high” and for longer
than the specified value.
?AA(cr)
if an invalid operation was entered.
There is no response if the module detects a syntax or
communication error, or even if the specified address does not exist.
!
is a delimiter character which indicates a valid command.
?
is a delimiter character which indicates an invalid command.
AA
(range 00-FF) represents the 2-character hexadecimal
address of the module.
(cr)
is the terminating character, carriage return (0Dh).
Example
command: $130H00020(cr)
response: !13(cr)
The command requests the counter/frequency module at
address 13 to set the minimum input width at high level to
20
? sec. The module stores the value and will identify an
input signal to be "high” only if the signal continues to be
“high” longer than 20
? sec. This function can be used as a
digital filter.