Kuhnke Electronics Instruction Manual

PROFIBUS
6.2.3 Send Diagnostic Data (Diag_Data)
The set of diagnostic data informs the master of the status
of the DP slave.
DP slave message
Usually the slave responds by sending a low-priority
telegram to the master. However, if the DP slave finds an
error, it sends the master a high-priority telegram. As long
as the master does not respond accurately but continues
data communication as before, the DP slave continues to
send a high-priority telegram.
Response from the master
The master's appropriate response to a high-priority frame
is to request the diagnostic data:
Sent by Frame
Recipient
Unit SAP
master request diagnostic data slave 60
slave send diagnostic data master -
After successful diagnosis, the master continues data
communication unless other actions are started by the
user program.
All diagnostic data are sent to the master where they are
mapped onto specific byte operands.
In the case of Kuhnke masters
� 645-500, 680I, PROFIBUS modules of system 680
and 657P, the VEBES configuration utility is used to
define this operand range.
� 645-12M and 680V, KUBES module DP_CTRL is
used to request and download the diagnostic data.
� Ventura Slot PLC and PC Control 645-PCI-CoDeSys,
function PbGetDiagnostics is run to download the
diagnostic data.
Six bytes (Octets 1...6) contain the standard diagnostic
information of Ventura Remote I/O. Bytes 7...13 contain
the device-specific diagnostic information. The text below
160 E 700 GB