Lenze DDS System bus CAN for PLC - Manual (Page 85)

System bus (CAN) for Lenze PLC devices
Configuration (CAN−AUX interface)
6−11
l
PLC−Systembus EN 2.0
6.11 Diagnostics
The following codes can be used for diagnostics purposes:
Code Information displayed Information
C2459 CAN−AUX operating status Chapter 6.11.1 ^ 6−11
C2460 Number of the telegrams sent and received Chapter 6.11.2 ^ 6−12
C2461 Bus load (in %) Chapter 6.11.3 ^ 6−13
·
Settings cannot be carried out via these codes.
6.11.1 Operating status of the CAN−AUX interface
Via C2459 you can have the operating status of the system bus displayed:
Code LCD Possible settings Information
Lenze Selection
C2459 CAN1 state g 0 Operational
1 Pre−operational
2 Warning
3 Bus off
System bus status (CAN−AUX)
C2459 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 C2458, if the PLC has been configured as a "quasi" master. ^ 6−8
– via the binary input signal "Reset node" at the CANaux_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 C2484. ^ 6−9