Advantech RS-485 user manual $aaSi6

Command Set		5017/5018 Analog Input
$aaSi6		$aaSi6
Name	Read Channels Status
Description	Asks a specified input module to return the status of all
	channels
Syntax	$aaSi6(cr)
	$ is a delimiter character.
	aa (range 00-FF) represents the 2-character hexadecimal
	address of the ADAM-5000 system you want to
	interrogate.
	Si identifies the I/O slot of the system you want to read
	channels status. The channel status defines whether a
	channel is enabled or disabled.
	6 is the read channels status command.
	(cr) is the terminating character, carriage return (0Dh)
Response	!aamm(cr) if the command is valid.
	?aa(cr) if an invalid operation was entered.

There is no response if the module detects a syntax error or communication error or if the specified address does not exist.

! 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 an ADAM-5000 system.

mm are two hexadecimal values. Each value is interpret- ed as 4 bits. The first 4-bit value represents the status of channels 4-7, the second 4 bits represents the status of

6-44 ADAM-5000