Basler DGC-2020 Generator Set Controller: Integrated Control and Debugging Guide

Both the current active DTC and the previously cleared active DTC can be viewed through HMI or BESTCOMSPlus.

Alarm and protection functions

7.1 Alarm Grading

DGC-2020 distinguishes three alarm levels:

Pre Alarm: Indicates situations that require attention but are not yet urgent, flashing alarm LED, programmable output to horn

Alarm: Indicates a serious malfunction and immediately shuts down the machine

Status Only: Used for monitoring only, does not trigger alarms

7.2 Key Protection Parameters

Description of Protection Function Setting Range

Undervoltage (27) 70-576 Vac, two independent set values, supporting single/three-phase mode

Overvoltage (59) 70-576 Vac, two independent set values, supporting single/three-phase mode

Underfrequency (81U) 45-65 Hz with voltage suppression function

Overfrequency (81O) 45-65 Hz-

Reverse power (32) -50% to+5% set as a percentage of rated power

Demagnetization (40Q) -150% to 0% set according to the rated reactive power percentage

16 types of inverse time curves for overcurrent (51) optional components

7.3 Low Line Scale Factor

This is a feature of DGC-2020: when a contact input (programmed as Low Line Override) is detected to be closed, the protection setting value is automatically multiplied by a scaling factor. This function is applicable to reconfigurable generator sets that can operate at different voltage levels.

BEST logic+programmable logic

BEST logic+is the "electronic wiring" system of DGC-2020, which connects input, output, protection components, and logic gates through graphical drag and drop to achieve customized control strategies.

Programming constraints:

Each multi input entry requires a minimum of 2 inputs and a maximum of 4 inputs

Up to 5 levels of logical depth for any path

Up to 10 gates per level of logic

Up to 64 connection points for all paths

Common logical objects:

Input objects: physical inputs IN1-IN16, virtual inputs VIN1-VIN4

Output objects: physical outputs OUT1-OUTx, remote outputs OUT13-OUT36

Protective components: 27TRIP, 59TRIP, 51TRIP, 32TRIP, 40TRIP

Control components: AVR (voltage regulator), GOVERNOR (speed regulator) GENBRK/MAINSBRK

Logic gates: AND, OR, NAND, NOR, XOR, NOT

Typical applications:

Map ATS input to automatic generator start

Route the protection trip signal to the designated output contact

Implement timing control for delayed startup, cooling shutdown, etc

Troubleshooting Guide

9.1 The generator circuit breaker cannot close to the dead busbar

Confirm that the closing request has been initiated

Set DEAD BUS CL ENBL to ENABLE in BREAKER HARDWARE

Confirm that the generator status is stable (GEN STANLE indicator light is on)

Confirm that the bus status is DEAD (BUS DEAD indicator light is on)

Adjust the dead bus threshold and delay in BUS Deliberation Protection

9.2 The generator circuit breaker cannot be closed to the live busbar

Confirm that the synchronizer option exists

Confirm that both the generator and busbar are in a stable state

Check if the synchronizer is actively working (observe the speed regulator/AVR rise and fall pulses or simulate bias voltage changes)

Confirm that the Sync Fail activation delay is long enough

9.3 CANbus communication failure

Confirm that there is a 120 Ω terminal resistor at each end of the bus

Check that the CAN H and CAN L connections are not reversed

Confirm that the bus length is ≤ 40m and the branch line is ≤ 3m

Confirm that the ECU configuration settings match the actual ECU type (Volvo/MTU/standard J1939)

9.4 Abnormal sensor readings

Confirm that the sensor common terminal (terminal 11) is connected to the negative terminal of the battery and the sensor on the engine side

Measure with a multimeter that there is no voltage difference between terminal 2 (BATT -) and terminal 11

The sensor circuit should be routed separately from the AC power line and ignition line, using independent conduit