Basler DGC-2020ES Configuration Instruction Manual page 49

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when power is cycled to the DGC- 2020ES. When No is selected, adjustments to rpm by raise/lower
commands are retained for the duration of only the current run session. The adjustments are discarded
the next time the engine is run or the DGC-2020ES is power cycled.
RPM Bandwidth: The RPM Bandwidth setting defines the speed adjustment range. For example, if the
Engine RPM setting is 1800 and the RPM Bandwidth is set to 100, the rpm can be adjusted from 1750 to
1850 rpm.
RPM Checksum: Some newer engine ECUs will not respond to TSC1 speed request when the speed is
a constant value unless a Message Counter and Checksum are implemented. This setting enables or
disables the Message Counter and RPM Checksum.
Start Mode
The Start mode specifies whether the engine should start normally or as rapidly as possible. When
Normal mode is selected, the engine will go through a normal start sequence when started. When Rapid
mode is selected, the engine will go through a rapid start sequence if the engine ECU is programmed for
a rapid start. A normal start could be employed when starting the generator is not time critical. However, if
there was a power outage, a rapid start could be employed to restore power as soon as possible.
Volvo Penta
Configuring the DGC-2020ES for Volvo Penta* necessitates the configuration of two additional settings:
Speed Select and Accelerator Position. The Speed Select setting configures the Volvo Penta ECU to
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 control 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.
DGC-2020ES
4-9
Communication