Basler Electric DGC-2020HD User Manual
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9469300990 Rev B
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CAN
A CAN is a standard interface that enables communication between multiple controllers on a common
network using a standard message protocol. DGC-2020HD controllers have a CAN interface that
supports the SAE J1939 protocol and the MTU protocol.
Caution
DGC-2020HD controllers have two separate CAN ports: CAN 1 and
CAN 2. CAN 1 consists of terminals 51 (CAN L), 52 (CAN H), and 53
(SHIELD) and communicates solely with Basler Electric expansion
modules. This port accommodates up to four CEM-2020s and up to
four AEM-2020s simultaneously. CAN 2 consists of terminals 54
(CAN L), 55 (CAN H), and 53 (SHIELD) and is dedicated for
communication with Engine Control Units (ECU) and related devices.
Applications using an engine-driven generator set controlled by a DGC-2020HD may also have an ECU.
The CAN interface allows the ECU and DGC-2020HD to communicate. The ECU reports operating
information to the DGC-2020HD through the CAN interface. Operating parameters and diagnostic
information, if supported by the ECU, are decoded and displayed for monitoring.
The primary use of the CAN interface is to obtain engine operating parameters for monitoring speed,
coolant temperature, oil pressure, coolant level, and engine hours without the need for direct connection
to individual senders. Table 66 lists the ECU parameters and Table 67 lists the engine configuration
parameters supported by the DGC-2020HD CAN interface. These parameters are transmitted via the
CAN interface at preset intervals. See the column labeled Update Rate in Table 66 for transmission rates.
Table 66. ECU Parameters Obtained from CAN Interface
ECU Parameter
Metric
Units
English
Units
Update Rate
SPN
∗
Actual Engine Percent Torque
%
%
Engine Speed
Dependent
513
Air Filter Differential Pressure
kPa
psi
500 ms
107
Air Inlet Temperature
°C
°F
1 s
172
Alarm Reset Feedback
Binary
Binary
1 s
2815
Ambient Air Temperature
°C
°F
1 s
171
Auxiliary Pressure 1
kPa
psi
On Request
1387
Auxiliary Pressure 2
kPa
psi
On Request
1388
Barometric Pressure
kPa
psi
1 s
108
Battery Voltage
Vdc
Vdc
1 s
168
Boost Pressure
kPa
psi
500 ms
102
Charge Air Temperature
°C
°F
1 s
2629
Coolant Level
%
%
500 ms
111
Coolant Pressure
kPa
psi
500 ms
109
DEF Inducement Level - Level of Inducement
Not to Run the Engine
%
%
1,000 ms
5246
DEF Severity Level - Severity of Tank Low
Level
%
%
1,000 ms
5245
DEF Tank 1 Level
%
%
1,000 ms
1761
DEF Tank 2 Level
%
%
1,000 ms
4367
DGC-2020HD
Communication