Monitoring The Communication And Response Of The Inverter - Siemens SINAMICS G120 Operating Instructions Manual

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Configuring the fieldbus
7.4 Communication via CANopen
Setting the node ID
You can define the node ID either using the DIP switch on the Control Unit, using parameter
p8620 or in STARTER in the screen form under "Control Unit/Communication/CAN" under
the CAN interface tab.
Valid node IDs:
Invalid node IDs:
When a valid node ID has been set using DIP switches, then this is always effective and
p8620 cannot be changed.
If you set all DIP switches to "OFF" (0) or "ON" (1), then the Node ID set in p8620 or
STARTER is effective.
The positions and settings of the DIP switches are described in Section Interfaces,
connectors, switches, terminal blocks and LEDs of the inverter (Page 39).
Setting the data transmission rate
You can set the transmission rate in the range from 10 kbit/s ... 1 Mbit/s using parameter
p8622 or in the STARTER screen form "Control Unit/Communication/CAN" under the CAN
interface tab.
7.4.3.2

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.
136
1 ... 126
0, 127
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
SINAMICS G120C Inverter

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