Siemens SINAMICS S120 Series - Page 206

Communication via SINAMICS Link
8.1 Basic principles of SINAMICS Link
Communication
204 Function Manual, 12/2018, 6SL3097-5BD00-0BP0
Send and receive data
The SINAMICS Link telegram contains 32 indices (0...31) for the process data (PZD1...32).
Each PZD is precisely 1 word long (= 16 bits). Indices that are not required are automatically
filled with "0". There is always a fixed assignment between the index and PZD: The index i
corresponds to PZD i+1.
Index
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
PZD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SINAMICS Link telegram content, Part 1
Index 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
PZD
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
SINAMICS Link telegram content, Part 2
Each transfer cycle, every SINAMICS Link node can send 1 telegram with 32 PZD. Each
node receives all of the telegrams that are sent. For each transfer cycle clock, a node can
select and process up to 32 PZD from all telegrams that have been received. The converter
can send and receive single words and double words. You must write double words in two
consecutive PZDs.
Limitations:
● Within a telegram, a PZD may only be sent and received once. If a PZD occurs more than
once in a telegram, then Alarm A50002 or A50003 is output.
● It is not possible to read in your own send data. SINAMICS S then initiates the
corresponding alarms. The following alarms are possible:
– A50006: According to what has been parameterized, data sent by itself should be
received. This action is not permitted.
– A50007: The send telegram word is larger than possible in the project.
– A50008: The receive telegram word is larger than possible in the project.
● The maximum number of PZDs that can be received and sent also depends on the drive
object. The number of PZDs that can be evaluated corresponds to communication
according to PROFIdrive; however, for SINAMICS Link, it is limited to a maximum of 32
PZDs.
● If CBE20 parameters were changed as a result of a project download, then alarm A08531
is output. In this case, a POWER ON is required to activate the values.
Transmission time
With SINAMICS Link, a transmission time of up to 500 µs is possible (with a max. controller
cycle of 500 µs; synchronous bus cycle of 500 µs).