Novatel NEXAGON CPT7, User Manual

Page: 126 / 193

Chapter 8 CAN Bus
CPT7 and CPT7700 Installation and Operation User Manual v12 126
3.
LOG CCOM1 PGN129026 ONTIME 0.25
4.
SAVECONFIG
8.4 Corrections Over CAN
All NovAtel supported correction types are supported over CAN ports (CCOM).
To send or receive corrections:
1. Configure the CAN Bus. See Configuring the CAN Bus on page 123.
2. Use the CCOMCONFIG command to configure the PGN and other CAN parameters used by the RTK
corrections CAN messages.
PGN : Use the PGN designated for corrections.
Address :
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Use 0xFF to receive corrections from any CAN address and to broadcast corrections to all CAN
nodes.
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Use 0x00 to 0xFE to send corrections to or receive corrections from a specific CAN node.
3. Use the INTERFACEMODE command to configure the CCOM interface mode.
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To transmit corrections, use the desired INTERFACEMODE, e.g. RTCMV3
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To receive corrections, it is recommended to use INTERFACEMODE AUTO.
Corrections configuration ( CANCONFIG and INTERFACEMODE ) for a particular CCOM port do not
affect its NMEA2000 configuration. NMEA2000 logs coexist with correction messages, both incoming
and outgoing.
8.4.1 Example for Receiving Corrections from Any Source
1.
CCOMCONFIG CCOM2 NODE1 J1939 61184 6 0xFF
2.
INTERFACEMODE CCOM2 AUTO NONE OFF
8.4.2 Example for Transmitting Corrections to 0x1C Node
1.
CCOMCONFIG CCOM2 NODE1 J1939 61184 6 0x1c
2.
INTERFACEMODE CCOM2 NONE RTCMV3 OFF
8.5 NovAtel Messages Over CAN
Standard NovAtel messages (commands, logs, responses) can be sent and received on the CAN Bus using
CAN ports (CCOM). To reduce CAN Bus loading, NovAtel messages are sent using NovAtel standard binary
format over J1939 (default).
The CCOM port requires special configuration and has the following limitations:
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A single CCOM port cannot be used for both Binary and ASCII / NovAtel ASCII messages.
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A single CCOM port cannot be used for both Binary messages and corrections.
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If the CCOM port is configured as NOVATEL , all input is interpreted as NovAtel ASCII or Abbreviated
ASCII. Unlike other COM ports, the receiver will not distinguish between ASCII and binary input.