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KDMON User Guide
1.2.
KDMON Operation Flow Chart
Initialisation
Read and delete
any existing SMS
messages from
modem
Trigger power-up
“alarm”
Check for
command from PC
interface
Check for
incoming SMS
command
Read ADC
When checking each type of
alarm, if that alarm type is
already triggered, but has
not been successfully
notified, another attempt is
made to send the alarm
notification
Check powerup alarm *1
No alarm
Check mA
alarm
No alarm
Notes:
*1. The power up alarm notification is
only attempted after KDMON has
been powered for more than 1
minute. This is in order to ensure
that the modem has sufficient time
to initialise.
*2. Depending on which comms
alarm type is in use, this may
involve sending one or more
Modbus requests to the slave
device(s) to read registers values.
*3. The power-up alarm and date/time
alarm automatically cancel once
notification succeeds. All other
alarms must be manually
cancelled using the front-panel
button or an SMS command.
Version 1.0
Check volts
alarm
No alarm
Check comms
alarm *2
No alarm
Check date/
time alarm *3
No alarm
Send periodic
SMS if period
elapsed
Notify Alarm
(see next page)
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