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Configuring the fieldbus
6.3 Communication over CANopen
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
155
6.3.2.2
Monitoring the communication and response of the inverter
The communication monitoring can be used via both node guarding and heartbeat protocol
(heartbeat producer).
Node guarding
The master sends monitoring queries to the slaves via the node guarding protocol.
If the converter does not receive a Node Guarding protocol within the Life Time, then it
outputs fault (F08700).
Life Time = Guard time (p8601.0) * Life Time Factor (p8604.1)
Heartbeat
The slave periodically sends heartbeat messages. Other slaves and the master can monitor
this message. If a heartbeat goes missing, then appropriate responses can be set in the
master.
The settings for the heartbeat protocol are made in parameter p8606.
Note
Note
Node guarding and heartbeat are mutually interlocked. This means that if the parameter for
one of these functions is not equal to 0, then the other cannot be used.
Both functions are deactivated in the factory setting.
Converter response to a bus fault - CAN controller state "Bus off"
(converter fault F8700, fault value 1)
If you acknowledge the bus fault using OFF/ON, the bus OFF state is also canceled and
communication is restarted.
If you acknowledge the bus fault via DI 2 or directly via p3981, then the converter remains in
the bus OFF state. To restart communication, in this case, you must set p8608 to 1.
WARNING
If you acknowledge the bus fault via DI 2 or directly via p3981 - and p8641 is set to 0 (for a
bus fault, the converter does not go into a fault condition), then you must restart
communication via p8608 = 1 before you can stop the motor via the control.
Содержание SINAMICS G120 CU230P-2
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