Parameter Interface; A.1.1 Parameter Interface - Siemens SIDOOR ATD401W System Manual

Length of the PKW and PZD areas
The lengths of the PKW and PZD areas can be parameterized independently (p2022
(number of PZDs), p2023 (number of PKWs)). The master and slave communication
partners have to agree on the lengths of the individual areas.
● Constant number of user data
If telegrams are to be used only with a constant number of user data, the sum of the
numbers of PKWs and PZDs must not exceed 126. According to the specification, a
maximum of 252 bytes (126 words) of user data are permissible.
● Variable PKW proportions
If telegrams with variable proportions of PKWs are to be used, the parameter for the
number of PKWs (p2023) must be set to 127, irrespective of how the parameter for the
number of PZDs is parameterized.
You will find further information about the number of PKWs in the Section Parameter value
(PWE) (Page 283) and about the number of PKWs in the Section Process data (Page 285).
A.1.1

Parameter interface

The PROFIBUS "variable-speed drives" profile defines the user data structure with which a
master can access slaves.
The area for the parameter channel of the telegram can be used for monitoring and / or
changing any parameters in the slave.
The parameter channel can be used to edit and monitor process data (read / write) as
described below.
Parameter channel
The parameter channel comprises 3 or 4 words according to the channel type.
PKE
IND
PWE Parameter value
Figure A-2
ATD4xxW Door Controller for Industrial Applications
System Manual, 01/2017, A5E38080677-AB
Parameter ID
Parameter index
Structure of the parameter channel in the telegram structure
A.1 Structure of user data/process data
Appendices
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