Structure Of The Telegrams - Siemens SINAMICS Series Operating Instructions Manual

Descriptions of functions
10.3 Communication according to PROFIdrive
Notes on the telegram structure
● The parameter p0978 contains the drive objects that use a cyclic PZD exchange. A zero
is used to demarcate the drive objects that do not exchange PZD.
● 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
● The following must apply to ensure conformity with the PROFIdrive profile:
– Interconnect PZD receive word 1 as control word 1 (STW1).
– Interconnect PZD send word 1 as status word 1 (STW1). (Use WORD format for
● One PZD = one word.
● Only one of the interconnection parameters (p2051 or p2061) can have the value ≠ 0 for
a PZD word.
● Physical word and double word values are inserted in the telegram as referenced
variables.
They refer to 100% = 16384 = pxxxx. However, you must take into account the internal
scaling of individual physical variables, e.g. r0080 torque, see SINAMICS DCM List
Manual.
● The reference variable is specified for each BICO in the parameter list. Most BICOs have
the unit "%".
The following then applies: Telegram content = 4000 hex (or 4000 0000 hex for double
words) corresponds to the value 100%.

Structure of the telegrams

You can find the structure of the telegrams in the SINAMICS DCM List Manual in the
following function diagram:
● 2420: PROFIdrive – Telegrams and process data
Drive object
DC_CTRL
ENC
TM15DI_DO
TM31
TM150
CU_DC
412
objects.
PZD1)
Telegrams (p0922)
3, 4, 999
81, 82, 83, 999
No predefined telegram.
No predefined telegram.
No predefined telegram.
390, 999
Operating Instructions, 12/2018, A5E34763375A
SINAMICS DCM DC Converter