Table of Contents
Advertisement
Chapter 4 SMART2 CAN Bus
4.2.5 Address Claim Procedure
To become operational on the CAN bus, a SMART2 must claim a J1939 address. The preferred
address and a range of alternative addresses are specified using the J1939CONFIG command.
When a configured receiver is placed on bus, it may make multiple attempts to claim an
address. It may also have its address bumped by a higher priority device claiming the same
address.
While the device is attempting to claim an address, the J1939STATUS log reports a status of
CLAIMING and automatically tries to claim the next allowed address. Depending on the
J1939CONFIG parameters, an address different from the J1939CONFIG preferred address
may be claimed or the address claim procedure can fail entirely. If no addresses could be
claimed, a FAILED status is reported and the receiver takes no further action. To recover from
this failure, take the receiver off bus using the CANCONFIG command and change the CAN
address configuration using the J1939CONFIG command.
The address can also be assigned using J1939 Commanded Address message sent by another
ECU on the bus, such as a tester unit. The commanded address always overrides the address
specified using J1939CONFIG command. When the Commanded Address is received, the
receiver reports a status of CLAIMING followed by CLAIMED. Restarting CAN using the
J1939CONFIG command or CANCONFIG command clears the commanded address; the
Address Claim procedure will be executed again based on parameters specified in the
J1939CONFIG command.
4.3 SMART2 NMEA2000 Logging
All NMEA2000 logs are configured using the LOG command, where the COM port is a CAN port
(CCOM).
To enable NMEA2000 logs:
1. Configure the CAN bus. See Configuring the CAN Bus on page 37.
2. Enable the desired NMEA2000 logs.
NMEA2000 logs can be requested regardless of the on/off bus status of the receiver or the J1939
configuration. They are output if and only if the receiver is online.
The position for the PGN129025, PGN129027 and PGN129029 logs are reported in
the user selected datum. See the OUTPUTDATUM command for more details.
4.3.1 How to Configure CAN1 to Transmit NMEA2000 Messages
1.
Enter the follow to configure CAN1:
CANCONFIG CAN1 ON 500K
2.
Enter the following to request NMEA2000 logs:
LOG CCOM1 PGN129029B ONTIME 1
LOG CCOM1 PGN129025B ONTIME 0.1
LOG CCOM1 PGN129026B ONTIME 0.1
LOG CCOM1 PGN129027B ONTIME 0.1
SMART2 Installation and Operation Manual 1
39
Advertisement
Table of Contents
