Verification Of J1939 Objects - THOMSON MEC 310#GENSET CONTROLLER OPTION J-CANBUS J1939 Manual

MEC 310 GENSET CONTROLLER - Option J – CANbus J1939
Object
EIC air filter diff.
EIC coolant filter diff.
EIC atmospheric press.
EIC ambient air temp.
EIC trip fuel gaseous
EIC total fuel used
gaseous
EIC engine trip fuel
EIC engine total fuel
used
For the Iveco Vector 8 type only:
(*1): EIC coolant temp.: PGN=65282, priority=6, start at byte 5, length=1byte, SPN=110, same
scale
(*3): EIC oil temp.: PGN=65282, priority=6, start at byte 6, length=1byte, SPN=175, same scale
(*2): EIC oil pressure. PGN=65282, priority=6, start at byte 7, length=1byte, 8kPa/bit gain, 0kPA
offset, data range: 0 to +2000 kPA
The objects are not supported by all engines. Please refer to the specific engine
type manual for information about the specific engine.
The Modbus addresses are read only (function code 04h), and are only available
if option M (Modbus RTU) is implemented.
To verify the communication, various CAN PC tools can be used. Common for these are that they
must be connected to the CANbus between the MEC 310 unit and the engine controller. When the
tool is connected, it is possible to monitor the communication between the two units. For use of the
CAN tool, please refer to the manual for the product used.
As an example, you may see the following telegram:
0xcf00400 ff 7d 7d e0 15 ff f0 ff
DATA BYTE: 1 2 3 4 5 6 7 8
- 0xc is the priority
- f004 is the PGN number (61444 in decimal value)
- The 8 bytes following the CAN ID ( 0xcf00400 ) are data, starting with byte 1
The priority needs to be converted to decimal. Note that the 3 priority bits in this case are displayed
in the CAN id (You see 0x c f00400 instead of 0x 0c f00400). In other cases you may read e.g.
0x18fef200 (PGN 65266).
PM077 R1 09/08/20
65270 6 5 1
65270 6 8 1
65269 6 1 1
65269 6 4 2
65199 7 1 4
65199 7 5 4
65257 6 1 4
65257 6 5 4

Verification of J1939 objects

Page 8
J1939-71 scaling
107 kPA 0.05 kPA/bit, offset 0
112 kPA 0.5 kPA/bit, offset 0
108 kPA 0.5 kPA/bit, offset 0
o
171 0.03125 C/bit, offset -273
°C
1039 kg 0.5 kg/bit, offset 0
1040
kg 0.5 kg/bit, offset 0
182
L 0.5 L/bit, offset 0
250
L 0.5 L/bit, offset 0
o
C
THOMSON TECHNOLOGY