Advantech Adam - 4021, User Manual, Page: 132 / 286

ADAM-4000 Series User Manual 120
The command sends the hexadecimal value 7FF to the
analog output module at address 1Bh. The module is
configured to a 0 to 20 mA output range and a hexadecimal
data format. It will output with a value of 10 mA
((7FFH/FFFH) x 20 mA = 10 mA).
4021
6.1.3 $AA4
Name Start-up Voltage/Current Output Configuration command
Description Stores the present output value of an analog output module
at address AA in the module’s non-volatile register. The
output value will take effect at start-up or after a brownout.
Syntax $AA4(cr)
$
is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address of the analog output module whose output current is to be set.
4 is the Start-up Output Current Configuration command.
(cr) is the terminating character, carriage return (0Dh).
Response !AA(cr) if the command is valid.
?AA(cr) if an invalid command was issued.
There is no response if the module detects a syntax or
communication error, or even if the specified address does not exist.
! delimiter character indicates that a valid command was received.
? delimiter character indicates that the command was invalid.
AA (range 00-FF) represents the 2-character hexadecimal
address of the analog output module.
(cr)
is the terminating character, carriage return (0Dh).
Example
command: $0A4(cr)
response: !0A(cr)
Presume the present output value of the analog output
module at address 0A is 9.4 mA. The command tells the
analog output module to store the present output value into
non-volatile memory. When the module is at start-up or
reset, its default output value will be 9.4mA. The response
of the analog output module indicates that the command
has been received.
Caution!
An analog output module requires a maximum of 6 milli-seconds after it
received a Startup Voltage/Current Output Configuration command to
let the settings take effect . During this interval, the module can not be
addressed to perform any other actions.