Technical data

32
CANopen / CM-CAN
communication
The CM-CAN communication option with controller area network interface, complies
with ISO/DIS 11898 transmission standard. The pinout of connector DB9 is based on
the “CAN in Automation e.V.” specification, which allows the connection of up to 127
nodes in the network. The network node addresses are assigned via software. The
endburden resistor is activated by means of a DIP switch on the module. The end of
line terminating current transmission protocol complies with CANopen specifications
DS-301 V4.02. The maximum allowed distance between the bus nodes depends on the
cable used and the selected transmission rate. See table.
Cable lenght Max Baud rate
up to 5000m 10
up to 2500m 20
up to 1000m 50
up to 800m 100
up to 500m 125
up to 250m 250
up to 100m 500
up to 25m 1000
Cable length limits the transmission
bandwith. Above table shows the match
between admissible cable lengths and
corresponding max kBaud rates. Values are
indicative and may significantly change
in relation to the transmission cable
characteristics.
Internal dipswitch to enable the terminating
resistor incorporated in the module
Location of CM-CAN module on the
frequency inverter
CM-CAN module
CANopen line
PC/Notebook