Winco DGC-2020 - Manual (Page 178)

Name Description Symbol
MAINSBRK This element is used to connect the breaker open and close output
signals from the DGC-2020 to physical output contacts to open and
close the mains breaker and map breaker status feedback to a
contact input. In addition, contact inputs can be mapped to allow
switches to be implemented to manually initiate breaker open and
close requests.
This element is only available when the Mains Breaker Hardware in
configured on the Breaker Hardware screen via the Breaker
Management tree branch.
Inputs
Status: This input allows a contact input to be mapped that will
provide breaker status feedback to the DGC-2020. When the
contact input is closed, the breaker is indicated to be closed. When
the contact input is open, the breaker is indicated to be open.
Open: This input allows a contact input to be mapped that can be
used to initiate a manual breaker open request. When this input is
pulsed closed while the DGC-2020 is in RUN or AUTO mode, the
breaker will open.
Close: This input allows a contact input to be mapped that can be
used to initiate a manual breaker close request. When this input is
pulsed and the DGC-2020 is in AUTO or RUN mode, and the
generator is stable, a close request will be initiated. If the Dead Bus
Close Enable parameter is TRUE, and the bus is dead, the breaker
will close. If the bus is stable, the DGC-2020 will synchronize the
generator to the bus, and then close the breaker. If the
synchronizer option is not available, the DGC-2020 can still close
the breaker if some external means is employed to synchronize the
generator to the bus.
Outputs
The outputs must be mapped to the contact outputs of the DGC-
2020 that will be used to drive the breaker.
Open: This output is pulsed TRUE (closes the output contact it is
mapped to) when the DGC-2020 is providing a signal to the
breaker to open. It will be a pulse if the Breaker Output Contact
Type is set to Pulse on the Breaker Hardware screen under
Breaker Management in the Settings Explorer, and the length is
determined by the Open Pulse Time. It will be a constant output if
the Mains Breaker Hardware Contact Type is set to continuous.
Note the pulse time must be set long enough for the breaker to
actually open before the pulse is removed.
Close: This output is pulsed TRUE (closes the output contact it is
mapped to) when the DGC-2020 is providing a signal to the
breaker to close. It will be a pulse if the Breaker Output Contact
Type is set to Pulse on the Breaker Hardware screen under
Breaker Management in the Settings Explorer, and the length is
determined by the Open Pulse Time. It will be a constant output if
the Mains Breaker Hardware Contact Type is set to continuous.
Note the pulse time must be set long enough for the breaker to
actually open before the pulse is removed.
MODEM
(Optional)
Connect the input to the output of another logic block. When TRUE,
the Modem will dial out.
OFFMODE When this input is TRUE, the DGC-2020 will switch to OFF mode.
This is a pulsed input. It does not need to be held after the desired
mode switch has occurred.
5-16 DGC-2020 BESTlogic+ Programmable Logic 9400200990 Rev K