Advantech ADAM 4000 user manual MA Calibration command

4021	Chapter 6
$AA0
Name	4 mA Calibration command
Description	Stores the current output value 4 mA for reference in the
	specified address in analog output module.
Syntax	$AA0(cr)
	$ is a delimiter character.
	AA (range 00-FF) represents the 2-character hexadecimal
	address whose data are to be sent.
	0 is the 4 mA Calibration command.
	(cr) is the terminating character, carriage return (0Dh).
Response	!AA(cr) if the command was 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 responding 2-character
	hexadecimal address of the analog output module.
	(cr) is the terminating character, carriage return (0Dh).
	Before issuing the 4 mA Calibration command, the analog
	output module should be trimmed to the correct value with
	the Trim Calibration command. A millimeter or a resistor
	and voltmeter should be connected to the module’s output.
	(Please refer to the analog output module’s Trim
	Calibration command and Chapter 8, Calibration, for a
	detailed description.)

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