Parker Hannifin 
Field Description  Read/
Write 
Description 
Start Network  R/W  When set, this flag will attempt to communicate 
with the CANopen network. This flag is 
automatically cleared by the controller when the 
attempt to start the network has completed. See 
the section on “Starting and Configuring the 
Network” for more details. 
Reset Network  R/W  When set this flag will reset all of the Extended 
I/O nodes. This may be needed if there is a baud 
rate, node ID, wiring change, unrecoverable 
error or a loss in communications. 
CANopen Controller 
Installed 
R  This flag is set if the controller has the CANopen 
hardware and cleared if it does not. 
Network Operational  R  This flag is set when the CANopen network is in 
the “operational” state and communicating. It is 
cleared if there is no communication or some 
other error. Check the below flags for more 
information on the error, the CANopen LED or 
the DIAG command. 
Network Start Failed  R  This flag is set when a request to start the 
network was issued and there was a failure. 
Check the below flags for more information, the 
CANopen LED and the DIAG command. 
Node Failure  R  This flag is set when one, more nodes are lost, 
or not responding while the network is 
operational. Check the below flags for more 
information, the CANopen LED and the DIAG 
command. 
SW Rx Overflow  R  A flag indicating that the software receive buffer 
has overflowed. 
HW Rx Overflow  R  A flag indicating that the hardware receive buffer 
has overflowed. 
 
Appendix E  CANopen   133 
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