Lenze 9400 - Manual (Page 330)

9 "CAN on board" system bus
9.9 Monitoring
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Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
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9.9.1.2 Parameter setting
Short overview of parameters for the "Node Guarding" monitoring function:
Guard time
The time interval with which the NMT master transmits the RTR telegram is the "Guard Time".
• For each NMT slave to be monitored an individual time interval can be set.
• The RTR telegram prompts the NMT slave to send its current status.
Node life time
The "Node Life Time" is the product of the "Guard Time" and the "Life Time Factor":
Node Life Time = Guard Time x Life Time Factor
• "Life time factor" and "Guard time" have to be known to the NMT master. For this, the values
from the NMT slave are read at each reboot, or defined values are sent to the NMT slave at each
reboot.
• It is possible to select a different "node life time" for each NMT slave to be monitored.
OK status
The status of the connection is ok (OK status) if within the "Node life time"
• the NMT slave has received an RTR telegram from the NMT master and
• the NMT master has received a correct response from the requested NMT slave.
In the OK status the monitoring times for the NMT master and the NMT slave are reset and the node
guarding protocol is continued.
Parameter Info Lenze setting Assignment
Value Unit Master Slave
C00382 CAN guard time 0 ms 
C00383 CAN life time factor 0 
C00386/1...32 CAN node guarding 0x00000000 
C00387 CAN Node Guarding Activity - 
C00388/1...32 CAN node guarding status - 
C00612/1...32 Resp. to CAN node guarding error No response 
C00614 Resp. to CAN life guarding error No response 
C00625 CAN behaviour in case of fault Pre-operational state  
Greyed out = display parameter