5.3 Examples
All examples are valid for S300/S700. All values are hexadecimal.
5.3.1 Basic testing of the connection to the S300/S700 controls
When the S300/S700 is switched on, a boot-up message is transmitted over the bus. The telegram
continues to be transmitted, as long as it has not yet found a suitable receiver in the bus system.
If a CAN master is unable to recognize this message, then the following measures can be taken to
test communication:
l
Check the bus cable: correct characteristic impedance, correct termination resistors at both
ends?
l
With a multimeter: check the quiescent level of the bus cables CAN-H and CAN-L against
CAN-GND (approx. 2.5 V).
l
With an oscilloscope: check the output signals on CAN-H and CAN-L at the S300/S700. Are
signals being transmitted on the bus? The voltage difference between CAN-H and CAN-L for a
logical "0" is approx. 2-3 V.
l
Does signal transmission stop if the master is connected?
l
Check the master hardware.
l
Check the master software!
CANopen for S300/S700 115
Kollmorgen 11/2018 Appendix
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