Chapter 4 Command Set 4-133
4021
Chapter 4
$AA4
Name Start-up Voltage/Current Output Configuration
Description Stores the present output value of an analog output module
with address AA in the module’s non-volatile register. The
output value will take effect upon 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 error or
communication error or if the specified address does not exists.
!
delimiter character indicating a valid command was received.
?
delimiter character indicating 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
with address 0A is 9.4 mA. The command tells the analog
output module store the present output value, in its non-volatile
memory. When the module is powered 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.
NOTICE: 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.
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