Description of the Units
Hardware Manual • Doc.-No.: C.3010.21 / Rev. 1.3
CAN-CBM-Clock
Page 16 of 34
3.3 Setting Node Number and CAN Bit Rate via Coding Switch
With the coding switches the CANopen node number and the CAN bit rate can be set.
If the position of the coding switches is evaluated as bytes, the assignment is:
Coding switch SW101 (upper switch *): High-nibble
Coding switch SW100 (lower switch *): Low-nibble
* Module is mounted on the mounting rail with the LEDs up.
3.3.1 Overview of the Coding Switch Settings
Coding switch position
(when switching on)
Interpretation by the firmware
0
bit rate will be set
01...7F
h
setting of the CANopen node number (node-ID)
80
h
...FE
h
reserved for future applications
FF
h
firmware update
Table 6: Index of the bit rate
3.3.2 Setting the CAN Bit Rate
To set the CAN bit rate the following steps have to be made:
1.
Switch the module off
2.
Position both coding switches to ‘0’
3.
Switch the module on;
LED141 (yellow) and LED 142 (green) turn on
4.
Select the bit rate and position switch SW100 correspondingly (table of bit rates see below)
5.
To accept the new bit rate position the switch to ‘1’;
LED141 turns off
6.
Switch off the module
7.
Set CANopen node number (see page 17)