Winco DGC-2020 - Manual (Page 105)

9400200990 Rev B DGC-2020 BESTlogic+ Programmable Logic 5-7
Name Description Symbol
LOGICPALM When this input is TRUE, the DGC-2020 goes into a Pre-alarm condition.
MODEM
(Optional)
Connect the input to the output of another logic block. When TRUE, the
Modem will dial out.
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.
CAUTION
Modifying a logic scheme in BESTCOMSPlus does not automatically make that
scheme active in the DGC-2020. The modified scheme must be uploaded into
the DGC-2020. See the paragraphs on Sending and Retrieving Logic Schemes
later in this section.
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.