Siemens SINAMICS S120 Function Manual page 762

Communication
11.4 Communication via SINAMICS Link
4. The sequence of the PZD in the send telegram of this node is defined in parameter
p8871[0...15] by the entries in the required slots.
5. The telegram is sent at the next bus cycle.
Receiving data
The sent telegrams of all nodes are simultaneously available at the SINAMICS Link. Each
telegram has a length of 16 PDA. Each telegram has a marker of the sender. You select
those PZD that you want to receive for the relevant node from all telegrams. You can
process a maximum of 16 PZD.
Note
If you have not deactivated the evaluation of bit 10 with p2037 = 2, the first word of the
receive data (PZD 1) must be a control word, where bit 10 = 1 is set.
In this example, Control Unit 2 receives selected data from the telegram of Control Unit 1.
Proceed as follows to receive data:
1. In parameter p8872[ 0...15] enter the address of the node for which you want to read one
or more PZDs (e.g. p8872[ 3] = 1 → from node 1, read in PZD 4, p8872[15] = 0 → do not
read in PZD 16).
2. After setting the parameters, you can read out the values via parameters r2050[0...15] or
r2060[0...15].
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Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions