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Digital I/O and Relay Output
Counter/Frequency Command Set
7-
56
ADAM 4000 Series User’s Manual
$AA1H(data)
Name Set Non-isolated High Trigger Level command
Description Set the high trigger level for non-isolated input signals for a
specified counter/frequency module.
Syntax $AA1H(data)(cr)
$ is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address that you will access to.
1H is the Set Non-isolated High Trigger Level command.
(data) is the high trigger level for non-isolated input
The unit and resolution are both 0.1 V (voltage). The
format is a two digit integer that range from 1 to 50 (i.e. 0.1
to 5 V). This high trigger level must at all times be higher
than the low trigger level which is set by the $AA1L(data)
command. When the high trigger level is out of range or
lower than the low 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 recognize input signal as “high”
only when they exceed the high trigger level
?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: $131H30(cr)
response: !13(cr)
The command requests the counter/frequency module at
address 13 to set its non-isolated high trigger level to 3 V.
The module stores the value and will identify the input
signals to be “high” only after the signals exceed 3 V. This
function can be used as a level filter.
4080D