DESCRIPTION OF OPERATION
0740 801 028
- 35 -
© ESAB AB 2017
26AP1:2 CAN bus & termination
Bus communication circuits to and from the circuit board
A standardised communication (CAN - Controller Area Network) bus is used for
communication between the units of the machine. Communication speed is 500 kbit/s.
The +12V_CAN power supply is unregulated and is galvanically isolated from other parts of
the control board. The power for the CAN is supplied from the welding power source.
The shell of the CAN connectors is connected to 0V_CAN.
Voltage regulator VR4 supplies a 5 V power supply to the CAN circuits.
Starting sequence
On power-up, the board's CAN controller
reads in the bus speed from the micro
processor: 500 kbit/s.
The circuit board displays the starting
sequence from power-up.
LED D10 lights red. Then LED D10, LED D11
and LED D12 lights green.
When the board has been initiated, and the
power source is in the application program,
LED D10 flashes continously with a green
light.
LED D13 is not used for any function.
LEDs on circuit board 26AP1
To Next Page
Loading...
