Novatel NEXAGON CPT7, User Manual

Page: 123 / 193

Chapter 8 CAN Bus
CPT7 and CPT7700 Installation and Operation User Manual v12 123
Details for the PGN messages can be found in the NMEA2000 specification which can be purchased
directly from the National Marine Electronics Association (
www.nmea.org/ ).
8.1 Default Configuration
After a FRESET, the receiver has the following CAN configuration:
l
All CAN physical ports are disabled
l
No J1939 addresses are claimed
l
CCOM ports are configured for NMEA2000 messages only
Parameter Value
Address 0x1C
Industry Group 2
Device Class 0
Device Class Instance 0
Function 23
Function Instance 0
ECU Instance 0
Manufacturer Code 305
Table 20: Default NAME
8.2 Configuring the CAN Bus
To enable an OEM7 receiver to communicate over the CAN bus, configure CAN and place the receiver on
bus , triggering a J1939 Address Claim Procedure .
1. Use the J1939CONFIG command to specify J1939 NAME and desired address.
This step is optional and only required if the default NAME parameters are to be changed.
2. Use the CANCONFIG command to place the receiver on bus .
3. Optionally, use the J1939STATUS log to monitor CAN status on the receiver.
8.2.1 Configuration Notes
l
The J1939CONFIG and CANCONFIG commands can be entered in any order. After the CANCONFIG
command is used to place the receiver on the CAN bus, J1939CONFIG commands take effect
immediately. Until then, J1939CONFIG can be entered many times to change the settings because they
have not taken affect yet (the receiver is not yet on the bus).
l
The J1939 Address claim procedure is executed if and only if both J1939CONFIG NODEx CANx and
CANCONFIG CANx ON are entered.
l
Use J1939STATUS log to determine the receiver's CAN status and the actual address claimed by a
particular node.