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ProfibusDP
Deutschmann Automation GmbH & Co. KG
50
UNIGATE fieldbus gateway for ProfibusDP V. 4.7
29.4.11
15.2.4
Diagnosis in DPV1
The "external diagnosis" of DPV0 (old PB) is used differently at DPV1. At DPV1 the alarms and
the status messages are transfered there. Since the gateway’s error numbers have been trans-
fered in the external diagnosis it became necessary then to carry out an adaptation at DPV1.
Now the 3 bytes "0x81, 0x00, 0x00" have been inserted in front of the actual error message in
order to be compatible with DPV1-masters. With it a DPV1-master identifies our gateway’s error
as status message now.
This results in a different representation of our gateway error in Profibus. At DPV0 the error num-
ber is transmitted in unmodified form as 1 byte external diagnosis. In case DPV1 has been acti-
vated in the gateway through the GSD-file, the error number occurs as 1 byte status message.
Octet 3 0
reserved
Diag.ext_overflow
Octet 4 0
Diag master_add: Master address after
programming (FF without programming)
Octet 5 0
Ident. number high byte
Octet 6 0
Ident. number low byte
Octet 7 0
External diagnosis: header, length entry
Octet 8 0
UNIGATE error number
Содержание UNIGATE RS232/422
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