PDU TYPES
Note:
In all the examples provided below, for clarity the checksum is replaced by the value “FF.”
ACK Message
•
I/O value read request (manager --> Vanguard 3000)
•
Output line setting request (manager --> Vanguard 3000)
•
Alarm acknowledgement (manager --> Vanguard 3000)
$IIACK,xxx*hh<CR><LF>
xxx: ASCII-encoded hex target descriptor,
composed of three fields <F1><F2><F3>
<F1> Operation being performed
0
Acknowledge an alarm or opening a digital output
1
Close a digital output
2
Read an analog or digital input
3-F
Reserved for future use
<F2> Class of I/O being operated on
0
Digital input
1
Analog input
2
Relay output (contact closure)
3-F
Reserved for future use
<F3> I/O Channel number
Digital Inputs (when <F2> is 0)
0
Ignition sense
1
DIN1
2
DIN2
3-F
Reserved for future use
Analog Input (when <F2> is 1)
0
Vanguard 3000 input voltage sense
1
Board/Cell module temperature sense
2
AIN1
3
AIN2
4-F
Reserved for future use
Digital Output (when <F2> is 2)
0
DO1 (COM1/NO1)
1
DO2 (COM1/NO1)
2-F
Reserved for Future use
hh:
NMEA-compliant checksum
Example:
Acknowledge a “Cell module temperature out of range” alarm
$IIACK,011,*FF<CR><LF>
Example:
Close Relay1
$IIACK,121,*FF<CR><LF>
Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B
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