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8.1.9.7
The network cable is not connected.
Cause
The bus cable between the Lenze Controller and the first node has been unplugged. If a previously removed bus
cable has been plugged back into the first EtherCAT device, the message EtherCAT_Master: EtherCAT cable
connected is entered in the logbook of the controller. The EtherCAT connection is re-established. Since the EtherCAT
slave sync managers do not receive any messages, a timeout expires and the slaves change to the Safe-Operational
state.
Error message
• EtherCAT_Master: EtherCAT cable not connected ... EtherCAT_Master: EtherCAT
cable connected
Remedies
After the bus cable has been plugged in again, restart the EtherCAT fieldbus.
8.1.9.8
A sent frame is not returned to the master
Cause
A frame sent by the master does not return to the master until the next cycle.
• The task utilization is too high, such that a sent frame takes longer than the time to the next start of the bus cycle
task.
• The EtherCAT bus cycle task does not have the highest IEC task priority or another task has the same IEC task
priority, such that the EtherCAT bus cycle task is suppressed.
• Due to an error, the slave does not forward any frames.
• Only a switch or an ET2000 is connected to the controller, but no further slave.
Error message
• EtherCAT_Master: Frame response error (repeated 1 time)
• EtherCAT_Master: Frame response error (repeated 10 times)
• EtherCAT_Master: Frame response error (repeated 100 times)
Remedies
• Reduce the program code or increase the bus task cycle time.
• Correct the bus structure.
• Correct the slave error.
• Assign the sole and highest IEC task priority to the EtherCAT bus cycle task.
8.1.9.9
The output shafts make a cracking sound
For motion applications in drive technology, a defective synchronization of 2 shafts leads to an
audible clicking noise.
Cause
The task and DC cycle times set in the logic/motion system differ.
Error message
-
Remedies
Adjust the task cycle time and DC cycle time.
Cause
Wiring error: The EtherCAT terminals (IN/OUT) of the slave were inverted. A fieldbus scan does not indicate this
error!
Error message
EtherCAT_Master: Set master 'Operational' failed. DCM not in-sync
Remedies
Correct wiring. Afterwards, reload the »PLC Designer« application into the automation system.
Cause
Clicking noise of the shafts after "out-of-sync"
If due to a fault, the preset DC deviation limit is exceeded, a re-synchronization of the DC slaves is carried out until
the slaves are synchronized again ("In-Sync") and the DC deviation is under the preset limit value again.
Currently, the Lenze controller is not re-synchronized to the distributed clocks, such that the sync pulses of the
master and the ones of the slaves are different.
Error message
EtherCAT_Master: DC slaves 'out-of-sync'. Deviation xxxxxxxx ns
Remedies
Restart the EtherCAT fieldbus so that the DC slaves and the DC master synchronize again.
Cause
Wrong selection of the device sync source. After the sync source has been changed, the subsequent download and
the setting of the slave to the Operational state may fail.
Error message
-
Remedies
• Manual setting of the code
• Repeated download with PLC start
• Restart the EtherCAT fieldbus by resetting the SoftMotion drive
Configuring the network
Error scenarios
4Restart network
^ 47
EtherCAT
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