GPS-721 User Manual
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GPS-721 User Manual V2.0, Oct. 2010
2.17
$AALS
There will be no response if the command syntax is incorrect,
there is a communication error, or there is no module with the
specified address.
Description:
This command is used to read the status of the latched digital
output channels.
Syntax:
$AALS[CHKSUM](CR)
$
Delimiter character
AA
Address of the module in hexadecimal format (00
to FF)
L
Command to read the latched status
S
0: Reads the low latched status
1: Reads the high latched status
Response:
Valid Command:
!AA(Data)[CHKSUM](CR)
Invalid Command: ?AA[CHKSUM](CR)
!
Delimiter for a valid command
?
Delimiter for an invalid command
AA
Address of the module in hexadecimal format (00
to FF)
(Data)
Status of the latched digital output channel as a
single digit hexadecimal value followed by 0
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