System bus (CAN) with Ser vo PLC & Drive PLC
Configuration (FIF interface)
5-10
l
PLC-Systembus EN 1.1
5.11 Diagnostics
The following codes can be used for diagnostics:
Code Display in f ormation Info
C2459 FIF CAN operating state Chapter 5.11.1 ^ 5- 10
C2460 Number of transmitted and received telegrams Chapter 5.11.2 ^ 5-11
C2461 Bus load (in %) Chapter 5.11.3 ^ 5- 11
• Settings cannot be made via these codes.
5.11.1 FIF CAN operating state
Via C2459 you can display the operating state of the system bus:
Code LCD
Possible settings
Info
Lenze Choice
C2459 CAN1 state
g
0 operational
1 Pre-operational
2 Warning
3Busoff
System bus state (FIF CAN)
C2459 Operating state Info
0 operational The system bus is operational. The PLC can transmit & receive parameter and process data.
1 Pre-operational The PLC can transmit & receive parameter data.Process data are ignored.
A status change from pre-operational to operational can be initiated by:
• the CAN master ^ 3-1
• a reset node
– via C2458, if the PLC was configured as a “quasi” master.
^ 5-7
– via the binary input signal “reset node” at the CAN_Management SB
^ 6-18
2 Warning The PLC has received faulty telegrams and no longer takes an active part in the system bus, i.e. it is no
longer possible to transmit data from the PLC.
Possible causes:
• A missing bus termination
• Insufficient screening
• Potential differences in the grounding of the control electronics
• An excessive bus load
• The PLC is not connected to the system bus
3 Bus off The PLC has decoupled itself from the system bus because too many faulty telegrams were received.
• The reaction t o this status can be configured via C2484. ^ 5-8
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