User manual

Planning Your Application Program
Chapter 6
$aaSi5mm
Name Enable/Disable Channels for multiplexing
Description Enables/Disables multiplexing for separate channels
of the specified input module
Syntax $aaSi5mm(cr)
$ is a delimiter character.
aa (range 00-FF) represents the 2-character hexadeci-
mal address of the ADAM-5000/TCP system.
Si identifies the I/O slot of the system.
5 represents the enable/disable channels command.
mm are two hexadecimal values. Each value is inter-
preted by the module as 4 bits. The first 4-bit value is
0. The second 4-bit value represents the
status of channels 0 to 3. A value of 0 means the
channel is disabled, while a value of 1 means the
channel is en- abled. (See the Read Channel
Status Command
$aaSi6). Note: Bit 4 can not enable a channel in the
ADAM-
5013 since the module is physically limited to 3 chan-
nels.
(cr) is the terminating character, carriage return (0Dh)
Response !aa(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 ad- dress
does not exist.
! delimiter character indicating a valid command was
received.
? delimiter character indicating the command was in-
valid.
aa (range 00-FF) represents the 2-character hexadeci-
mal address of an ADAM-5000/TCP system.
(cr) is the terminating character, carriage return (0Dh)
Example command: $01S1501(cr)
response: !01(cr) The command enables/disables
the channels of the analog input module in slot 1
of the system at ad- dress 01h. Hexadecimal 0 is a
fixed value. Hexadeci- mal 1 equals binary 0001,
which enables channel 0 and disables channels 1
and 2.
ADAM-5000/TCP User’s Manual
6-57