Communication Failure When Booting Or In Cyclic Operation; Example: Transmission Times For Sinamics Link - Siemens SINAMICS S120 Function Manual

11.4.5

Communication failure when booting or in cyclic operation

If at least one sender does not correctly boot after commissioning or fails in cyclic operation,
then alarm A50005 is output to the other nodes: "Sender was not found on the SINAMICS
Link."
The message contains the number of the faulted node. After you have resolved the fault at
the node involved and the system has identified the node, the system automatically
withdraws the alarm.
If several nodes are involved, the message occurs a multiple number of times consecutively
with different node numbers. After you have resolved all of the faults, the system
automatically withdraws the alarm.
When a node fails in cyclic operation, in addition to alarm A50005, fault F08501 is output:
"COMM BOARD: Monitoring time, process data expired"
11.4.6

Example: Transmission times for SINAMICS Link

Transmission times at a communication cycle of 1 ms
p2048/p8848 = 1 ms
Transmission times at a communication cycle of 4 ms
p2048/p8848 = 4 ms
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Bus cycle
Sync both
0,5 1,0
1,0 1,5
2,0 3,0
Bus cycle
Sync both
0,5 1,0
1,0 1,5
2,0 3,0
11.4 Communication via SINAMICS Link
Transmission time
Sync send Sync receive
1,5 1,3
2,1 2,1
3,6 3,1
Transmission time
Sync send Sync receive
3,0 2,8
3,6 3,6
5,1 4,6
Communication
Async both
1,6
2,2
2,8
Async both
4,6
5,2
5,8
767