Acyclic Communication; General Information About Acyclic Communication - Siemens sinamics dcp Operating Instructions Manual

Operation
8.4 Communication according to PROFIdrive
● An alarm is issued if the same hardware (Control Unit onboard or COMM BOARD) is
selected in p8839[0] and p8839[1]. Then the setting of p8839[0] is valid, and the setting of
p8839[1] is treated just like 'inactive'.
● If p8839[x] is set to 2, and the COMM BOARD is missing/defective, then the
corresponding interface is not automatically supplied from the Control Unit onboard
interface. Message A08550 is output instead.
Overview of important parameters (see the SINAMICS DCP List Manual)
• p0922
• p0978[0...24]
• p8815[0...1]
• p8839[0...1]
8.4.5

Acyclic communication

8.4.5.1

General information about acyclic communication

With acyclic communication, as opposed to cyclic communication, data transfer takes place
only when an explicit request is made (e.g. in order to read and write parameters).
The "Read data record" and "Write data record" services are available for acyclic
communication.
The following options are available for reading and writing parameters:
● S7 protocol
This protocol uses the STARTER commissioning tool, for example, in online mode via
PROFIBUS.
● PROFIdrive parameter channel with the following data sets:
– PROFIBUS: Data block 47 (0x002F)
– PROFINET: Data block 47 and 0xB02F al global access, data set 0xB02E as local
Note
Please refer to the following documentation for a detailed description of acyclic
communication:
Reference: PROFIdrive Profile V4.1, May 2006, order no.: 3.172
148
IF1 PROFIdrive PZD telegram selection
List of drive objects
IF1/IF2 PZD functionality selection
PZD Interface hardware assignment
The DPV1 services are available for master class 1 and class 2.
access
Operating Instructions, 05/2016, A5E34382853K
SINAMICS DCP