Lenze DDS System bus CAN for PLC Manual de usuario descargar pdf (Pagina 47)

System bus (CAN) for Lenze PLC devices

"CAN" system bus interface configuration

3−13

PLC−Systembus EN 2.0

3.13 Diagnostics

The following codes can be used for diagnostics purposes:

Code Information displayed Information

C0359 Operating status of the system bus Chapter 3.13.1 ^ 3−13

C0360 Number of the telegrams sent and received Chapter 3.13.2 ^ 3−14

C0361 Bus load (in %) Chapter 3.13.3 ^ 3−15

· Settings cannot be carried out via these codes.

3.13.1 Operating status of the CAN interface

Via C0359 you can have the operating status of the system bus displayed:

Code LCD

Possible settings

Information

Lenze Selection

C0359 CAN state

0 Operational

1 Pre−operational

2 Warning

3 Bus off

System bus status

C0359 Operating status Information

0 Operational The system bus is fully functional. The PLC can transmit and receive parameter and process data.

1 Pre−operational The PLC can transmit and receive parameter data. Process data, however, are ignored.

A status change from Pre−operational to Operational can be effected by:

· the CAN master ^ 3−2

· a reset node

– via C0358, if the PLC has been configured as a "quasi" master. ^ 3−8

– via the binary input signal "reset node" at the CAN_Management SB ^ 7−20

2 Warning The PLC has received faulty telegrams and is only involved in the system bus passively, i. e. no data can be

sent from the PLC anymore.

Possible causes:

· Missing bus termination

· Non−sufficient shielding

· Differences in potential with regard to the earth connection of the control electronics

· Bus load too high

· PLC is not connected to the system bus.

3 Bus−off The PLC has disconnected from the system bus due to too many faultily received telegrams.

· The response to this status can be configured via C0595. ^ 3−11

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Lenze DDS System bus CAN for PLC Manual de usuario Pagina 47