Sensaphone SCADA 3000 Users manual - Manual (Page 296)

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SCADA 3000 User’s Manual
alarm exists. Remember, an unacknowledged alarm exists only when the red alarm LED blinks
on the front panel.
• There are no Destinations selected for alarm Notification. For each alarm, you must select
which of the 64 dialout destinations to contact.
• ‘Max Calling Rounds’ might be set to zero, in which case the SCADA 3000 will make no
attempt to call. You should increase the calling rounds to a number greater than zero. The
default setting is 100.
• The MON switch on the SCADA 3000 unit is in the Disable position.
I keep getting a busy signal when I call my SCADA 3000.
The SCADA 3000 may be trying to deliver an alarm message or a report and the destination
intercall delay times are very short. The unit waits the programmed intercall time after con-
tacting a destination before it dials the next number in the sequence. If this period is too short,
you’ll have only a short time to call in before the SCADA 3000 begins dialing the next destina-
tion. Extend the length of the intercall time for each destination.
Why am I getting a temperature reading of -100 degrees F (-75 degrees C)?
You’ll get this reading if a temperature sensor has become disconnected or has broken wires.
Examine the wires to the temperature sensor and connect or replace the wiring.
Why am I getting a temperature reading of 300 degrees F (150 degrees C)?
• The temperature sensor wires may have shorted or are touching. Examine the temperature
sensor wiring and correct or replace the wiring.
• A shunt for setting the input type may not be installed in the TMP/DRY position. Check
and move the shunt to the correct position.
Why does SCADA 3000 call again with the same alarm after I just acknowledged it?
• Alarm Recognition time may be set too short. If an alarm is acknowledged, then clears and
quickly re-trips, the SCADA 3000 must wait the Alarm Recognition time before calling again.
Lengthen the Alarm Recognition time to avoid rapid callbacks for the same alarm.
• The Alarm Reset Time is too short. Alarm Reset Time is the time allowed for an acknowl-
edged alarm‘s fault condition to be corrected before the unit reactivates the alarm and begins
the dialout process all over again.
Why won’t the SCADA 3000 main unit communicate with expansion I/O modules?
Every SCADA 3000 expansion I/O module (except the annunciator module) has a built-in
communications bus diagnostic feature. If the module’s yellow ‘PULSE’ LED is blinking,
communications to that module are working normally. If a module’s ‘PULSE’ LED is off, that
module is no longer communicating with the SCADA 3000 main unit. A loss of communica-
tion is usually due to one of the following:
• The communications bus is not properly terminated. Termination is required at the extreme
ends of the communications network to minimize signal errors. Check that the SCADA
3000 main unit and all expansion modules have their bus termination jumpers in the correct
positions. See Chapter 7 (I/O Expansion Modules) for more information on communications Bus
Termination.