Configuration
Diagnostics codes
CAN bus load (C0361)
8
189
EDBCSXS064 EN 4.0
8.4.3 CAN bus load (C0361)
It can be detected via C0361 which bus load in percent is needed by the controller or by the
single data channels. Faulty telegrams are not considered.
Bus load of the individual subcodes:
C0361 Meaning
Subcode 1 All telegrams sent
Subcode 2 All telegrams received
Subcode 3 Sent telegrams of CAN1_OUT
Subcode 4 Telegrams sent from CAN2_OUT
l Always "0"; channel is not used!
Subcode 5 Telegrams sent from CAN3_OUT
l Always "0"; channel is not used!
Subcode 6 Telegrams sent from parameter data channel 1
Subcode 7 Telegrams sent of parameter data channel 2
Subcode 8 Telegrams received from CAN1_IN
Subcode 9 Telegrams received from CAN2_IN
l Always "0"; channel is not used!
Subcode 10 Telegrams received from CAN3_IN
l Always "0"; channel is not used!
Subcode 11 Telegrams received from parameter data channel 1
Subcode 12 Telegrams received of parameter data channel 2
The data transfer is limited. The limits are determined by the number of telegrams
transmitted per time unit and the baud rate.
The limits can be determined during data exchange in a drive network by adding all drives
involved under code C0361/1.
Example:
Drive/host Bus load
C0361/1 − controller 1 23.5 %
C0361/1 − controller 2 12.6 %
Host 16,0 %
52.1 % (total)
Two drives and the host (PLC) are interconnected via the MotionBus (CAN).
Note!
ƒ Max. bus load of all devices involved: 80 %
ƒ If other devices are connected, as for instance decentralised inputs and
outputs, their telegrams must be taken into consideration.
ƒ If the time between the individual sync telegrams is too short the bus can be
overloaded.
– Remedy: Change synchronisation cycle of the master control and the
controller (C1121).
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