Siemens SINAMICS S120 Series Function Manual page 41

Telegram interconnections
● The telegram interconnection is made automatically and blocked.
Telegrams 20, 111, 220, 352 are exceptions. There, in addition to the fixed
interconnections, selected process data (PZD) can be interconnected as required in the
send/receive telegram.
● When you change p0922 ≠ 999 to p0922 = 999, the previous telegram interconnection is
retained. You can now change this telegram interconnection.
● If p0922 = 999, a telegram can be selected in p2079. A telegram interconnection is
automatically made and blocked. The telegram can also be extended.
This is an easy method for creating extended telegram interconnections on the basis of
existing telegrams.
The telegram structure
● Parameter p0978 contains the drive objects that use a cyclic PZD exchange. All drive
objects after the first zero do not participate in the cyclic exchange.
● If the value 255 is written to p0978, this drive object is visible to the PROFIdrive controller
and empty (without actual process data exchange). This permits cyclic communication of
a PROFIdrive controller in the following cases:
– with unchanged configuration to drive units that have a different number of drive
– with deactivated drive objects, without having to change the project
● One PZD = one word.
● Physical word and double word values are inserted in the telegram as referenced
variables.
● p200x apply as reference variables (telegram contents = 4000 hex or 4000 0000 hex in
the case of double words if the input variable has the value p200x).
Figure 3-1
You can find the detailed structure of the telegrams in the SINAMICS S120/S150 List Manual
in the associated function diagrams.
Communication
Function Manual, 12/2018, 6SL3097-5BD00-0BP0
objects.
Normalization of speed
Communication according to PROFIdrive
3.2 Cyclic communication
39