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3.1.3
THE LEDS AND THE BUZZER INDICATIONS
Green LED blinking slowly
- After resetting the RTU, there is a delay before
starting the capacitor charging. The delay
depends on the RTUs address, and it is calculated
by the RTU's address multiplied by 2. During the
delay, there will be slow blinking of the green led.
Green LED blinking fast
- The fast blinking exists during the charging of the
capacitor.
Usually the charging takes a few seconds, but if it
keeps going on for 10 minutes it indicates a
problem. The charging stops and the unit
disconnects itself from the communication. Both
the green and the red LEDs will be switched off.
The only way to exit this status is by resetting the
RTU.
Red LED blinking each second
- Indicates that the RTU recognizes being called by
it's address and it is responding.
The buzzer when enabled from the center, sounds a double beep
every 5 seconds
indicating normal operation. Otherwise, there will be a long beep
every 5 seconds. During
output test mode, there is a short beep for "open" and 2 short beeps for "close" commands.
3.1.4
TESTING INPUTS AND OUTPUTS OF THE MODULAR RTU
The inputs and outputs are tested one by one. The number of the input and output to be tested is
selected by dipswitch block SW4 as follows:
SW4
Input/Output under test
000
1
100
2
010
3
110
4
001
5
101
6
011
7
111
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INPUT TEST
– The test begins by pushing the button SW3. Each change in the status of the selected
input will be indicated by a short beep of the buzzer.
OUTPUT TEST
– While being in INPUT TEST, push SW3 again, this will terminate the INPUT TEST
and will start the OUTPUT TEST. An "open" command will be sent to the selected output followed by a
single beep
. Another push of SW3 generates a "close" command followed by a double beep
.
Each push of SW3 will switch the solenoid between "open" and "close" positions.
To exit test mode change the position of SW4 or wait 1 minute and it will exit automatically.
