Setting The Baud Rate; Setting The Monitoring Of The Communication - Siemens SINAMICS G120 Operating Instructions Manual

Configuring the fieldbus
7.8 Communication over CANopen
7.8.3.3

Setting the baud rate

Setting the data transfer rate
You set the data transfer rate using parameter p8622 or in the STARTER
"Control Unit/Communication/CAN" screen form under the "CAN interface" tab.
Setting range: 10 kbit/s ... 1 Mbit/s. The maximum permissible cable length for1 Mbit/s is
40 m.
In order that a newly set or modified data transfer rate becomes effective, switch on the
inverter power supply and, if being used, the 24 V supply for the Control Unit. Switch on the
voltages again after all LEDs at the inverter have gone dark.
7.8.3.4

Setting the monitoring of the communication

To monitor the communication, use one of the following methods:
• Node guarding / life guarding
• Heartbeat
Node guarding / life guarding
Principle of operation
● Node guarding:
Is always active if heartbeat is not activated (p8606 = 0). Node guarding means the
master sends monitoring queries to the converter which then answers.
The converter does not monitor the communication. Set the responses to a bus failure in
the master.
● Life guarding:
is active if you use p8604.0 and p8604.1 to set a lifetime ≠ 0.
Life Guarding means that the converter monitors the master's monitoring query and
reports fault F8700 (A) with fault value 2, if a life guarding protocol (life guarding event) is
not received within the lifetime. Set additional responses to a bus failure in the master.
Calculate value for lifetime
Life time = guard time in milliseconds (p8604.0) * life time factor (p8604.1)
212
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB