System bus (CAN) with Ser vo PLC & Drive PLC
Configuration (AIF interface)
4-8
l
PLC-Systembus EN 1.1
4.9 Diagnostics
The following codes can be used for diagnostics:
Code Display in f ormation Info
C2121 Operating status A IF CAN Chapter 4.9.1 ^ 4- 8
• Settings cannot be made via these codes.
4.9.1 Operating state of the automation interface
Via C2121 you can display the operating state of the automation interface:
Code LCD
Possible settings
Info
Lenze Choice
C2121 AIF state
g
Bit 0 XCAN1_IN monitoring time
Bit 1 XCAN2_IN monitoring time
Bit 2 XCAN3_IN monitoring time
Bit 3 XCAN bus off
Bit 4 XCAN operational
Bit 5 XCAN pre-operational
Bit 6 XCAN warning
Bit 7 internally assigned
AIF state, bit-coded
• Detailed information can be
found in the description for the
corresponding fieldbus module.
C2121 Operating state Info
Bit4 = 1 Operational The syst em bus is operational. The PLC can transmit & receive parameter and process data.
Bit5 = 1 Pre-Operational The PLC can transmit & receive parameter data.Process data are ignored.
A status change from pre-operational to Operational can be carried out through:
• the CAN master ^ 4-1
• a reset node
– via C0358, if the PLC was configured as a “quasi” master.
^ 3-6
– via the binary input signal “reset node” at the CAN_Management SB
^ 6-18
Bit6 = 1 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
Bit3 = 1 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 C2382/4. ^ 4-7
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