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7 Profibus interface
7.1 Profibus function
The Profibus module supports all baud rates from 9,6 kbit/s up to 12000 kbit/s with auto detection of the baud
rate. The functionality is defined in IEC 61158. The Profibus address can be programmed by a terminal pro-
gram, WPC-300 or online via the Profibus. A diagnostic LED indicates the online status.
7.2 Installation
A typical screened Profibus plug (D-Sub 9pol with switchable termination) is mandatory. Every Profibus seg-
ment must be provided with an active bus termination at the beginning and at the end. The termination is al-
ready integrated in all common Profibus plugs and can be activated by DIL switches. The bus determination
needs a 5 Volt power supply for the correct function, which is supplied at PIN 6 of the D-sub-socket. The Profi-
bus cable has to be screened at the determined contact clips in the Profibus plug.
7.3 Device data file (GSD)
The Profibus-DP features are documented in a device-data-file. Structure, content and code of this file (GSD)
are standardized. They allow the projecting of any DP-slaves with projecting devices of several producers.
The GSD-data are read by a PROFIBUS-Master-configuration software and the correspondent settings are
given to the master.
Enclosed is also the identification number of the Profibus knot. It is necessary for a master without significant
report overhead to identify the types of the connected devices.
The GSD-file is available at the address: http://www.w-e-st.de/files/software/hms_1810.gsd
File: hms_1810.gsd
In the setting of the transfer bytes, 16 bytes (8 words consistent) are necessary as IN/OUT variables.
Page 31 of 37
PAM-199-P-PDP
05.06.2020
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