The original CANopen® specification is on one hand limited to a maximum of 127 nodes, however - it was kept "open" enough to provide room for extensions. Actually so much room that several, very different solutions exist for this problem. There are application-specific, customized versions of CANopen® networks installed that have more than 127 nodes. Contact your favorite CANopen® consultant to learn how a support of more than 127 nodes could be best implemented in your application.

Q: Is 127 "really" the maximum number of nodes in a CANopen® network?

A: Not "really" :-)

The original CANopen® specification is on one hand limited to a maximum of 127 nodes, however - it was kept "open" enough to provide room for extensions. Actually so much room that several, very different solutions exist for this problem. There are application-specific, customized versions of CANopen® networks installed that have more than 127 nodes. Contact your favorite CANopen® consultant to learn how a support of more than 127 nodes could be best implemented in your application.