Operating instructions

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4.12 Control parameters

For the monitoring of the system bus and the display of the internal states, two con-

trol parameters are provided. There is a report of the system bus state and a report o

the CAN state via two actual value parameters.

The parameter

Node-State 978 gives information about the Pre-Operational, Opera-

tional, Stopped state. A PDO transfer is only possible in the Operational state. The

state is controlled by the system bus master (PLC / PC / frequency inverter) via NM

telegrams.

The parameter

CAN-State 979 gives information about the state of the physical layer.

If there are transmission errors, the state chan

es from OKAY to WARNING until the

cancellation of the communication with BUS-OFF. After BUS-OFF, the CAN controller is

automatically re-initialized and the system bus started again.

Note: If the BUS-OFF state occurs, the frequency inverter breaks down with

"F2210 BUS-OFF".

After Bus-OFF, the system bus in the frequency inverter is completely reinitialized.

There is a new boot-up messa

e from the subscriber and an emer

ency tele

ram with

the Bus-OFF message is transmitted. The change of state of the subscriber to Opera-

tional is done by the Start-Remote-Node tele

ram cyclically sent by the system bus

master.

Actual values of the system bus

No. Description Display

978 Node-State 1 - Pre-Operational

2 - Operational

3 - Stopped

979 CAN-State 1 - OKAY

2 - WARNING

3 - BUS-OFF