Winco DGC-2020 - Manual (Page 180)

Name Description Symbol
STARTOUTPUT This element is used to drive the start output relay from logic when
the Start Output Relay configuration is set to “Programmable”.
When the Start Output Relay configuration is set to
“Programmable”, the start relay will not close unless logic is used to
drive this element. When the Start Output Relay configuration is set
to “Predefined”, the start relay is closed according to the predefined
start functionality of the DGC-2020. When the “Predefined”
functionality is selected, the relay will not respond to this element.
TESTINHIBIT When this logic element is TRUE, the generator exercise timer
cannot start the generator. If the TESTINHIBIT logic function is
FALSE during an exercise period, or transitions from TRUE to
FALSE at any time during an exercise period, the DGC-2020 will
start and run the generator for the duration of the exercise period.
LOGIC SCHEMES
A logic scheme is a group of logic variables written in equation form that defines the operation of a DGC-
2020 Digital Genset Controller. Each logic scheme is given a unique name. This gives you the ability to
select a specific scheme and be confident that the selected scheme is in operation. One logic scheme is
configured for typical control applications and is the default active logic scheme. Only one logic scheme
can be active at a given time. In most applications, preprogrammed logic schemes eliminate the need for
custom programming. Preprogrammed logic schemes may provide more inputs, outputs, or features than
are needed for a particular application. This is because a preprogrammed scheme is designed for a large
number of applications with no special programming required. Unneeded logic block outputs may be left
open to disable a function or a function block can be disabled through operating settings.
When a custom logic scheme is required, programming time is reduced by modifying the default logic
scheme.
The Active Logic Scheme
Digital Genset Controllers must have an active logic scheme in order to function. All Basler Electric DGC-
2020’s are delivered with a default, active logic scheme pre-loaded in memory. If the function block
configuration and output logic of the default logic scheme meets the requirements of your application,
then only the operating settings (power system parameters and threshold settings) need to be adjusted
before placing the DGC-2020 in service.
Copying and Renaming Preprogrammed Logic Schemes
Copying a saved logic scheme to the active logic (Logic Name) and assigning a unique name is
accomplished by loading the saved logic scheme into BESTCOMSPlus and then typing over the logic
scheme's name. Changes are not activated until the new settings have been saved and uploaded to the
device.
Sending and Retrieving Logic Schemes
Retrieving a Logic Scheme from the DGC-2020
To retrieve settings from the DGC-2020, the DGC-2020 must be connected to a computer through a
communications port. Once the necessary connections are made, settings can be downloaded from the
DGC-2020 by selecting Download Settings on the Communication pull-down menu.
Sending a Logic Scheme to the DGC-2020
To send settings to the DGC-2020, the DGC-2020 must be connected to a computer through a
communications port. Once the necessary connections are made, settings can be uploaded to the DGC-
2020 by selecting Upload Settings on the Communication pull-down menu.
CAUTION
Always remove the DGC-2020 from service prior to changing or modifying the
active logic scheme. Attempting to modify a logic scheme while the DGC-2020 is
in service could generate unexpected or unwanted outputs.
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