ICP DAS USA M-7026, User Manual

Page: 78 / 185

M-7026
M-7026 User Manual Rev: 1.5 Date: 2016/03/10
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2.31 $AALS
Description:
This command is used to read the status of the latched Digital Input and Digital
Output channels of a specified module.
Syntax:
$AALS[CHKSUM](CR)
$
Delimiter character
AA The address of the module to be read in hexadecimal format (00 to
FF)
L The command to read the status of the latched Digital Input and
Digital Output channels
S The status to be read
0: Reads the status of the low latched Digital Input and Digital Output
channels
1: Reads the status of the high latched Digital Input and Digital Output
channels
Response:
Valid Command: !(Data)[CHKSUM](CR)
Invalid Command: ?AA[CHKSUM](CR)
! Delimiter character to indicate a valid command
? Delimiter character to indicate an invalid command
AA The address of the responding module in hexadecimal format (00 to
FF)
(Data) The status of the latched Digital Output and Digital Input channels
represented by a four digit hexadecimal value followed by 00.
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.
Examples:
Command: $01L1 Response: !010200
Reads the status of the high latched Digital Output and Digital Input
channels of module 01 and returns a response indicating that the
command was successful, with a value of 010200 showing that Digital
Output channel 0 and Digital Input channel 1 are latched high.
Command: $01C Response: !01
Clears the status of the latched Digital Output and Digital Input channels
of module 01 and returns a response indicating that the command was
successful.
Command: $01L1 Response: !000000
Reads the status of the high latched Digital Output and Digital Input
channels of module 01 and returns a response indicating that the
command was successful, with a value of 000000 showing that all high