Basler Electric DGC-2020 - Manual (Page 316)

Figure 7-31. Logic Example of Programmable Relays
Setting Up Configurable Elements in the DGC-2020.
Configurable elements are used with BESTlogicPlus Programmable Logic to allow a user to implement
logic that causes an alarm or pre-alarm. This can be used to build protection that is not part of the
standard protection in the DGC-2020. See Figure 7-32.
Front Panel Navigation Path: SETTINGS > PROGRAMMABLE OUTPUTS > CONFIG ELEMENTS
The parameters for configurable elements are similar to those for programmable inputs. Set the following
parameters for each configurable element:
1. Alarm Configuration - Select None, Alarm, or Pre-Alarm. When an alarm occurs, the horn
annunciates with a constant high-pitched sound and the engine stops. When a pre-alarm occurs, the
horn annunciates with an alternating on and off beep and the engine remains running. If None is
selected, the element is status only. The status is available as an input to BESTlogicPlus
Programmable Logic regardless of the setting of the Alarm Configuration.
2. Activation Delay - This setting defines the duration that the configurable element is true before alarm
or pre-alarm annunciation.
3. Label Text - Enter descriptive text describing how the configurable element is used. This text appears
next to the configurable element status in BESTlogicPlus Programmable Logic and in the event log if
the Alarm Configuration is set as an Alarm or Pre-Alarm.
4. Contact Recognition - Select whether the configurable element is recognized always or only while the
engine is running. A selection of While Engine Running Only prevents spurious annunciation when
the engine is stopped.
For example, if the door of the generator room is opened a pre-alarm should occur to alert the control
room that someone is in the generator room. In addition, suppose for safety reasons, any running
machines should be stopped any time someone enters the generator room. Assume Input 5 is set up to
indicate “DOOR OPEN” and it is configured as a Pre-Alarm. In BESTlogicPlus Programmable Logic, Input
5 could be ANDed with ENGINE RUNNING to drive Configurable Element 1, which is configured as an
alarm. The logic diagram is shown in Figure 7-33.
Input 5, configured as a Pre-Alarm, triggers a pre-alarm if the door is opened whether the engine is
running or stopped. Configurable Element 1, configured as an Alarm, triggers an alarm if the door is
opened while the engine is running.
7-28 DGC-2020 Setup 9400200990 Rev X