DEN-XCR Communications - CANOpen / Ethernet

The Servo Drive supports the CANopen interface, a multi-terminal communication protocol based on CAN (Controller Area Network) bus. P3 connector ETH Port 1 (only) could be used with a standard Ethernet port for configuration. The drive CAN interface is not isolated. If your computer has no Ethernet port, you can use an Ethernet - USB adapter, like TeckNet HU043.

It is possible to control a servo drive from a CAN Master or from a computer with a CAN transceiver. Some USB to CAN transceivers that work with Everest XCR are indicated here: Kvaser Leaf SemiPro HS (EAN: 73-30130-00242-5), Kvaser Leaf Professional Rugged HS (EAN: 73-30130-00509-9), Peak Systems PCAN-USB (IPEH-002021), Peak Systems PCAN-USB opto-decoupled (IPEH-002022). Always ensure to have the drivers installed prior to connection.

An example of the required wiring for the CANopen interface is shown in the next figure.

CAN wiring recommendations

Build CAN network using cables with 2-pairs of twisted wires (2 wires/pair) as follows: one pair for CAN_H with CAN_L and the other pair for GND.
Do not make a 2 wire only interface. Not connecting the CAN GND may result in loss of data and poor EMC performance.
Cable impedance should have an impedance of 100 to 140 Ω (120 Ω typical) and a capacitance below 30 pF/meter.
Whenever possible, use bus links between the CAN nodes. Avoid using stubs (a "T" connection, where a derivation is taken from the main bus). If stubs cannot be avoided, keep them as short as possible. For maximum speed (1 Mbps), use a stub length lower than 0.3 meters.
For a total CAN bus length over 40 meters, it is mandatory to use shielded twisted cables. Connect the cable shield to GND at both ends. Ensure that the cable shield is connected to the connector shield, as the connection to host GND is usually soldered inside the connector.

Drive ID

When installing CANopen communication, ensure that each servo drive is allocated a unique ID. Otherwise, CANopen network may hang.

Lors de l'installation de la communication CANopen, assurez-vous que chaque servomoteur se voit attribuer un identifiant unique. Sinon, le réseau CANopen risque de se bloquer.