Basler Electric DGC-2020ES - Manual (Page 157)

9469200990 Rev C 149
operate the engine at the primary or secondary base speed. If the engine is configured by Volvo for 60 Hz
applications, the primary base speed is 1,800 rpm and the secondary base speed is 1,500 rpm. If the
engine is configured by Volvo for 50 Hz applications, the primary base speed is 1,500 rpm and the
secondary base speed is 1,800 rpm. The Accelerator Position setting is expressed as a percentage and
tells the Volvo Penta ECU where to set the engine speed (trim) relative to the base speed. The range of
the setting is the base speed
±120 rpm. A setting of 0% will cause the engine to run at 120 rpm below the
base speed, a setting of 50% will cause the engine to run at the base speed, and a setting of 100% will
cause the engine to run at 120 rpm above the base speed. The Accelerator Position setting is linear with
a gain of 2.4 rpm/percentage. This setting is not saved in nonvolatile memory and defaults back to 50%
after DGC-2020ES operating power is cycled.
The DGC-2020ES 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-2020ES 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
programmable Engine RPM setting to achieve the desired engine RPM.
•
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-2020ES.
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.
MTU
If the engine is configured as MTU MDEC, the configuration of the following settings is necessary:
•
MDEC Module Type - Specifies the type of MDEC module.
•
Speed Demand Switch - Specifies speed demand source for the MTU engine ECU.
•
NMT Alive Transmit Rate - Specifies the rate at which messages are transmitted to the MTU
engine.
If the engine is configured as MTU ADEC, the configuration of the following settings is necessary:
•
Speed Demand Switch - Specifies speed demand source for the MTU engine ECU.
•
Overspeed Test - Temporarily drives an MTU ECU into overspeed for testing overspeed.
•
Governor Param Switch Over - Specifies which governor parameters an MTU ECU should use.
•
Trip Reset - Resets trip information such as trip fuel used, trip hours, trip idle time, etc.
•
Int Oil Prime - Causes an MTU ECU engine to perform an internal lubrication cycle.
If the engine is configured as MTU ECU7/ECU8, the configuration of the following settings is necessary:
DGC-2020ES Communication