AS-i/PROFIBUS Gateway
Profibus-DP
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group · Tel.: Germany (621) 776-0 · USA (330) 4253555 · Singapore 7799091 · Internet http://www.pepperl-fuchs.com
issue date 12.10.1999
41
(all data stated in hexadecimal code)
Profibus Configuration of the Profibus-DP slave
The Profibus configuration of the AS-i/PROFIBUS Gateways built up out of the follow-
ing Profibus slots:
process data/AS-i flags of AS-i Master 1
standard identification byte (1..16 bytes) or empty slot
management channel
standard identification byte 0xB2 (3 bytes) or 0xB4 (5 bytes) or empty slot
user memory (AS-i Control)
standard identification byte or extended identification byte (altogether up
to 128 bytes) or empty slot
Empty slots at the end of the configuration telegram can be left out.
In contrast to the easy mode, the size of the I/O window can be matched to the exten-
sion of the AS-i network. Its size in bytes amounts:
(highest AS-i slave address + 1) / 2
Any non-integer value has to be rounded up to a full byte.
If the requested data field length for the user memory is smaller than the calculated
length from the parameter telegram, the gateway will not take up any communication
relationship with the DP-master.
The maximum data field length for input respectively output data is 149 bytes with a
device with one AS-i Master.
8.4 Profibus Diagnosis telegram
Besides the on-the-spot-diagnosis via the figure display and the seven LEDs, there is
also the possibility of a diagnosis via the Profibus-DP. The Profibus diagnosis tele-
gram meets the Profibus norm.
The Profibus diagnosis telegram depends on the operation mode.
8.4.1 Diagnosis telegram in easy mode and advanced mode
The diagnosis telegram contains 9 bytes in the easy mode or the advanced mode.
The structure is represented in the following table.
byte content
0 station status 1
1 station status 1
2 station status 1
3 station number DP-master
4-5 manufacturer code
6 header and length of the device-based diagnosis
7 AS-i slave address
8 type of configuration error
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