AS-Interface
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
42
Whereas the bytes 0 to 5 of the diagnosis telegram are stipulated by the Profibus-DP
norm and independent of the used DP slave, bytes 6 to 8 of the diagnosis telegram
are used by the AS-i/PROFIBUS Gateway to display any deviation of the actual con-
figuration of the AS-i network from the projected AS-i configuration. If there is no dis-
crepancy the bytes 6 to 8 are left out.
Byte 6:
Header and length of the device-based diagnosis.
This byte always is 03hex.
Byte 7:
Lowest slave address with a configuration error (hexadecimal representa-
tion).
Byte 8:
Type of configuration error (hexadecimal representation).
00
hex
: Projected AS-i slave is missing
F0
hex
: Actual configuration data differ from projected configuration data
Differences between projected and actual ID-code and I/O-code (only in
protected mode of AS-i Master)
FF
hex
: Not projected AS-i slave on the AS-i circuit detected.
The number of the first detected erroneous slave is transmitted.
Special Error Messages:
• AS-i power fail: The voltage supply on the AS-i network is insufficient.
• At least one slave's actual ID-code and I/O-configuration differ from the projected
values (only in configuration mode).
• Device is not in normal operation, but no AS-i power fail occurred.
• No failure.
byte 6 byte 7 byte 8
03
hex
FF
hex
00
hex
byte 6 byte 7 byte 8
03
hex
FF
hex
F0
hex
byte 6 byte 7 byte 8
03
hex
FF
hex
FF
hex
byte 6 byte 7 byte 8
03
hex
00
hex
00
hex
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