Parameter
Range
Default
Notes
Set point
Varies
-
Depends upon selected input scale unit
Reset hysteresis
Varies
-
Depends upon selected input scale unit
Action
Selectable list
-
Inhibit(s)
Selectable list
-
Low oil pressure analogue input alarm example
Configure the analogue input for the oil pressure sensor under
Configure > Input/output > [Hardware module] > AI >
Sensor setup
. In this example, the sensor provides a 4 to 20 mA signal, which corresponds linearly to 0 to 10 bar.
Configure the sensor as follows:
Sensor =
0 to 25 mA
Units =
bar
Select an unused
Custom input scale #
.
Input (mA), Minimum =
4
, Maximum =
20
Output (bar), Minimum =
0
, Maximum =
10
Create two points for the curve:
4 mA and 0 bar
; and
20 mA and 10 bar
.
Configure the alarm as follows:
Name =
Low oil pressure
Trigger level =
Low
Enable =
Enabled
Delay =
0.1 seconds
Set point =
1 bar
Action =
Trip generator breaker and shutdown engine
Inhibit =
Engine not running
If the engine is running, but the oil pressure falls below 1 bar (this corresponds to an analogue input of less than 5.6 mA)
for more than 0.1 seconds, then the alarm is activated. The controller trips the breaker and shuts down the engine.
4.9 Miscellaneous alarms
4.9.1 System not OK
This alarm communicates that there is a problem with one of the hardware modules in the
controller.
The system is okay if all of the following conditions are met:
•
All the modules in the rack are sending an OK signal.
•
All the modules in the rack have a software version that is compatible with the
controller application software.
•
All the modules required for a specific controller type are present in the rack.
•
The alternating current module has received all the required settings (wiring mode,
nominal settings, and so on) at start-up.
•
The controller software has started and is running OK.
By default, the
Status OK
alarm output is configured to terminals 3 and 4 of the power
supply module of the controller. This configuration cannot be removed or changed.
0
1
Alarm >
Status OK
Time
Configure the parameters under
Configure > Parameters > Local > Monitoring > System not OK
. The alarm is always enabled.
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