CAN Interface Specification
057-295 ISSUE: 1
Page 48 of 60
8 CAN INTERFACE SPECIFICATION
In addition to the Configuration port, the DSEA109 features a CAN communication port. The CAN port
is used for live operational communications between the DSEA109 and compatible DSE genset
controllers, encompassing both the transmission of AVR data and the receipt of external commands
where applicable.
Parameter
Description
Protocol
S.A.E. J1939 with PGNs as listed in the following subsections.
Bit Rate
250 kb/s
Isolation
±2.5 kVrms
Termination
120
Ω termination resistor, with the option for direct PCB installation.
8.1 INSTRUMENTATION AND CONTROL
8.1.1 BROADCAST MESSAGES
NOTE: All broadcast CAN messages are priority 3 by default, however it is possible to
change the priority of the configurable CAN messages utilising DSE Configuration Suite PC
Software. For further details of module configuration, refer to DSE Publication: 057-283
DSEA109 Configuration Suite PC Software Manual.
Parameter Groups below are broadcast by the DSEA109 AVR and are detailed in the following
subsections.
NOTE: SPNs that are not implemented in the DSEA109
have all bits set to ‘1’.
NOTE: PDU Format and PDU Specific are shown in Hexadecimal.
NOTE: Values larger than 8 bits utilise Little-Endian format. For example a 16 bit value,
occupying two Bytes has Byte1 as the most significant Byte and Byte2 as the least significant
Byte.
8.1.1.1
VREP
– VOLTAGE REGULATOR EXCITATION STATUS
Priority
Ext Data Page
Data Page
PDU Format
PDU Specific
Size (Bytes)
Rate
3
0
0
FD
A6
8
100 ms
SPN
Hex
Decimal
Instrument
Byte / Bit
Scaling
Offset
Units
0D34
3380
Generator Excitation Field Voltage
Byte 1 to 2
0.05 V/bit
-1606.0 V
V
0D36
3382
Generator Output Voltage Bias
Percentage
Byte 5 to 6
0.1 %/bit
-100
%
