DE-3000 IOI 7-17
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20.0 ALARM FUNCTION
20.1 OVERVIEW
The alarm function may occur on any of the analog or digital input channels. The
channel is typically a point of concern, but not for safety protection. This allows
the user to take action, while still allowing the engine to run.
20.2 FUNCTION
The status of an alarm condition may be viewed from the VIEW CHANNELS
MODE. When a channel is in the alarm condition, the channel will display the
ALARMED message and output #6 on the terminal board will turn on. This may
be connected to a horn or a light. Press the F2 key on the ALARMED channel to
silence the alarm (output #6).
The following is needed for the point to be in an alarm condition:
1. The unit must be setup for alarms.
2. The channel must be programmed for an alarm condition.
3. The channel must be timed out and armed.
4. The analog input channel must be violating its control setpoint (either
high or low).
5. The digital input channel must be tripped but not in a faulting condition.
6. The unit cannot be in either a STOP or a faulted condition.
20.3 In the following example the high control setpoint for channel 12 is set for 25.0 PSIG
STATUS RUNNING
ARMED
CHAN 12 22.8 PSIG
MANIFOLD AIR PRESS
RUNNING
When the pressure goes above 25.0 the ALARMED message reads:
STATUS RUNNING
ALARMED
CHAN 12 26.3 PSIG
MANIFOLD AIR PRESS
RUNNING
STATUS RUNNING
ARMED
CHAN 12 22.8 PSIG
MANIFOLD AIR PRESS
STATUS RUNNING
ALARMED
CHAN 12 26.3 PSIG
MANIFOLD AIR PRESS
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