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5 Operation
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
5-7 Monitoring the Network
5
5-7-2 Monitoring Slave Status
Extended Slave Diagnostics
Extended diagnostics data are often provided by a slave device to indicate additional slave specific
diagnostics, error and alarm information which cannot be contained in the standard data part of the
diagnostics message. These extended diagnostics data bytes are sent by the slave in a diagnostics
message following the standard data part.
For slave devices supporting extended diagnostics data the associated GSD files often provide lan-
guage dependent text strings to facilitate interpretation of the diagnostics codes sent by the slave
device.
The Generic Slave DTM provides for a simple interface which facilitates the displaying of such
extended diagnostics data strings.
The presence of extended diagnostics as part of the diagnostics data message is indicated by
• the indicator marked Extended Diagnostics received in the Master DTM - Monitor tab, Slave
Status tab (refer to section 5-7-1 Monitoring the Master Unit and the Network).
• the indicator in the Diagnostics tab of the slave Diagnostics User Interface (see for example,
the figure above).
Also, if no extended diagnostics are available, the Extended Diagnostics tab will be disabled and
inaccessible.
To display the extended diagnostics click on the Extended diagnostics tab in the Slave Diagnostics
User Interface.
The figure below shows an example of the extended diagnostics window containing extended diag-
nostics data. The first row in the diagnostics window shows the raw data bytes. The second and
third row show the actual message contained within the extended diagnostics message.
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