Canbus – Winco DGC-2020 User Manual
Page 41
9400200990 Rev B
DGC-2020 Functional Description
3-5
Windows
®
based communication software package that is supplied with the DGC-2020. A detailed
description of BESTCOMSPlus is provided in Section 4, BESTCOMSPlus Software.
CANBus
A Control Area Network (CAN) is a standard interface that enables communication between multiple
controllers on a common network using a standard message protocol. DGC-2020 controllers have a CAN
interface that supports the SAE J1939 protocol and the MTU/MDEC protocol.
Applications using an engine-driven generator set controlled by a DGC-2020 may also have an Engine
Control Unit (ECU). The CAN interface allows the ECU and DGC-2020 to communicate. The ECU reports
operating information to the DGC-2020 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 3-1 lists the ECU parameters and Table 3-2 lists the engine configuration
parameters supported by the DGC-2020 CAN interface. These parameters are transmitted via the CAN
interface at preset intervals. See the column labeled Update Rate in Table 3-1 for transmission rates. This
information can also be transmitted upon user request.
CAN interface connections are made at 48 (CAN L), 49 (CAN H), and 50 (SHIELD).
Table 3-1. ECU Parameters Obtained from CAN Interface
ECU Parameter
Metric
Units
English
Units
Update Rate
Decimal
Place
∗
SPN
Actual engine percent torque
%
%
engine speed
dependent
none 513
Air filter differential pressure
kPa
psi
500 ms
100
th
107
Air inlet temperature
kPa
°F
1 s
none
172
Ambient air temperature
°C
°F
1 s
10
th
171
Barometric pressure
kPa
psi
1 s
10
th
108
Battery voltage
Vdc
Vdc
1 s
10
th
168
Boost pressure
kPa
psi
500 ms
none
102
Coolant level
%
%
500 ms
10
th
111
Coolant pressure
kPa
psi
500 ms
10
th
109
Engine coolant temperature
°C
°F
1 s
none
110
Engine intercooler temperature
°C
°F
1 s
none
52
Engine oil level
%
%
500 ms
10
th
98
Engine oil pressure
kPa
psi
500 ms
10
th
100
Engine oil temperature
°C
°F
1 s
10
th
175
Engine speed
rpm
rpm
engine speed
dependent
none 190
Exhaust gas temperature
°C
°F
500 ms
10
th
173
Fuel delivery pressure
kPa
psi
500 ms
10
th
94
Fuel rate
liter/hr
gal/hr
100 ms
100
th
183
Fuel temperature
°C
°F
1 s
none
174
Injection control pressure
MPa
psi
500 ms
none
164
Injector metering rail pressure
MPa
psi
500 ms
none
157
Intake manifold temperature
°C
°F
500 ms
none
105
Percent load at current rpm
%
%
50 ms
none
92
Switched battery voltage (at
ECU)
Vdc Vdc
1
s
10
th
158
Throttle (accelerator pedal)
position
% %
50
ms
10
th
91
Total engine hours
hours
hours
requested 1.5 s
100
th
247
Total fuel used
liters
gallons requested
1.5
s none
250
Trip fuel
liters
gallons requested
1.5
s none
182
∗ SPN is suspect parameter number.