User manual

CG-ARM7/D/E CAN/CAN Gateway

EMS Dr. Thomas Wünsche

The bit timing key indicates the speed of the particular CAN channel.

BTR1 indicates the baud rate for CAN channel 1, BTR2 the baudrate

for CAN channel 2. Both keys must exist in each configuration file.

This keys are directly related to the CANBTR registers of the used

controller LPC2119. This allows most flexible customization of the

baudrate settings. The basic CAN clock is 48 MHz.

Example:

# CAN channel 1: 1Mbit/s

btr1 = x00140005

# CAN channel 2: 500KBit/s

btr2 = x001C0005

Standard speeds recommend by CiA are located in chapter 4.2

Standard Baudrates.

The program identifiers (PIDs) are required for the gateway

configuration via CAN. If you do not want to program the gateway via

CAN, you can remove this keys from your configuration file.

The PIDs determine which identifiers will be used for programming

the gateway. pidin” defines the identifier the configuration software

uses to send requests to the gateway. The key "pidout” defines the

identifier which the gateway uses to reply to the configuration

software.

For CAN channel 1 and CAN channel 2 different PIDs can be set.

But it is also possible to program the gateway just via one CAN

channel. To set the identifiers for CAN channel 1 use the keys

"pidin1” and pidout1. For CAN channel 2 use the keys "pidin2” and

"pidout2.

To use a 29-bit identifier prepend the character x” before the

particular key. Without prefix 11-bit identifiers will be sent. in chapter

4.2 Standard Baudrates.

btr1, btr2 CAN bit timing

pidin, pidout program identifier