Basler Electric DGC-2020 - Manual (Page 134)

a gain of 2.4 rpm/percentage. This setting is not saved in nonvolatile memory and defaults back to 50%
after DGC-2020 operating power is cycled.
The DGC-2020 sends the following parameters to a Volvo Penta ECU through Volvo Proprietary J1939
communications:
•
Start Request - sent when starting the engine.
•
Stop Request - sent when shutting down the engine.
•
Idle Request - sent when the Idle Request logic element is true in BESTlogicPlus.
•
Preheat Request - sent anytime the DGC-2020 would normally have its PRE relay closed for
engines requiring a preheat contact.
•
Accelerator Pedal Position - sent based on the Accelerator Position setting. If the Accelerator
Pedal Position setting is left at the default 50%, this is calculated and sent based on the
programmed Engine RPM setting to achieve the desired engine RPM. If an LSM-2020 is present
and the DGC-2020 senses the generator breaker is closed, the DGC-2020 is in kW control mode
and the Accelerator Pedal Position is sent based on the kW controller output to adjust engine
throttle for kW control.
•
Primary/Secondary Engine Speed - sent based on the Speed Select setting and the state of the
Alternate Frequency Override element in BESTlogicPlus. Primary speed is sent when the Speed
Select setting is set for Primary and Secondary speed is sent when the Speed Select setting is
set for Secondary. However, these are reversed if the Alternate Frequency Override is true. A
setting of Primary results in Secondary being sent and a setting of Secondary results in Primary
being sent when the Alternate Frequency Override is true.
∗ The Volvo Penta ECU configuration is applicable only to the EDC3 and EMS2 models of Volvo Penta
engine controllers.
Cummins
When Cummins is selected as the ECU type, the following parameters are sent to the engine via
Cummins Proprietary J1939 communications:
•
Start Request - sent when starting or running the engine.
•
Stop Request - sent when stopping the engine.
•
Idle Request - sent when the Idle Request logic element is true in BESTlogicPlus.
•
Rated Speed (50 or 60 Hz) - sent based on the Rated Speed setting of the DGC-2020. However,
these are reversed if the Alternate Frequency Override is true. A setting of 60 Hz Rated Speed
results in 50 Hz being sent and a setting of 50 Hz Rated Speed results in 60 Hz being sent when
the Alternate Frequency Override is true.
Diesel Particulate Filter (DPF)
The diesel particulate filter settings are used when the ECU is configured for Standard, Volvo Penta, MTU
ADEC, GM/Doosan, Cummins, or MTU Smart Connect. The DGC-2020 supports the CAN bus
parameters that are related to the diesel particulate filter implemented on certain engines to meet Tier 4
emission requirements. Three pre-alarms provide DPF status:
•
DPF Regenerate Required pre-alarm
− announced when the DPF lamp status broadcast over
CANBus indicates that regeneration is required.
•
DPF Regenerate Disabled pre-alarm
− announced when the engine ECU reports via CAN bus
that DPF regeneration is disabled.
•
High Exhaust Temperature pre-alarm
− announced when the ECU reports via CAN bus that a
high exhaust temperature condition exists.
Two parameters are provided to initiate or disable DPF regeneration. The first, Manual Regeneration F , is
transmitted to the engine over CAN bus to initiate DPF regeneration. The second, Disable Regeneration G ,
is transmitted to the engine over CAN bus to disable DPF regeneration. Extended operation with
regeneration disabled is not recommended.
MTU
If the engine is configured as MTU MDEC, the configuration of the following settings is necessary:
•
MDEC Module Type H - Specifies the type of MDEC module.
•
Speed Demand Switch I - Specifies speed demand source for the MTU engine ECU.
4-24 DGC-2020 BESTCOMSPlus
® Software
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