ADAM-4000 Series User Manual 244
4080, 4080D
7.2.3.9 $AA1L(data)
Name Set Non-isolated Low Trigger Level command
Description Set the low trigger level of non-isolated input signals for a
specified counter/frequency module.
Syntax $AA1L(data)(cr)
$ is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address that you will access to.
1L is the Set Non-isolated Low Trigger Level command.
(data) is the low trigger level for non-isolated input signals.
The unit and resolution is 0.1 V (voltage). The format is a
two digit integer that can range from 1 to 50 (i.e. 0.1 to 5 V).
This low trigger level must at all times be lower than
the high trigger level, set by $AA1H(data) command. When
the low trigger level is out of range or higher than the high
trigger level an error will occur.
(cr) is the terminating character, carriage return (0Dh).
Response !AA(cr) if the command is valid. The addressed module
stores the value and will identify input signal as “low” only
when it exceeds the low trigger level
?AA(cr) if an invalid operation was entered.
There is no response if the module detects a syntax or
communication error, or 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: $051L08(cr)
response: !05(cr)
The command requests the counter/frequency module at
address 05 to set its non-isolated low trigger level to 0.8 V.
The module stores the value and will identify the TTL input
signal to be “low” only if the signal exceeds 0.8 V. This
function can be used as a level filter.
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