3 Configuration Software
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CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
The Generic Slave Device DTM provides a Diagnostics User Interface to display diagnostics data sent
by the slave device to the PROFIBUS Master Unit. In general a slave device can send two type of diag-
nostics.
Basic Diagnostics
Basic Diagnostics: The first six bytes of each diagnostic message sent by a slave device contain
mandatory status and error flags. The flags are defined by the PROFIBUS standard. The basic diag-
nostics information is displayed in the Diagnostic tab of the Diagnostics User Interface.
Extended Diagnostics
Extended Diagnostics: Depending on the type of slave device, it may additionally send extended
diagnostic bytes in a format defined in the PROFIBUS standard. The extended diagnostics usually
contain device specific diagnostics information. The extended diagnostics information is displayed in
the extended Diagnostics tab of the Diagnostics User Interface.
Updating the Diagnostics
The Diagnostics User Interface contains two tabs. It also contains an Update button, which will,
when pressed, refresh the diagnostics data by retrieving it from the PROFIBUS Master Unit. A
Green indicator in the lower left corner will indicate whether or not the device is online.
The Diagnostics tab displays basic diagnostics for the slave. An example of the Diagnostic tab is shown
below. The diagnostics information is displayed as red and green indicators. Red indicators refer to
error events. Green indicators refer to status situations.
The indicators are listed in the table below.
3-3-2 Diagnostic User Interface
Diagnostics Tab
Name Description
Master lock The slave device has been parameterized by another master.
Parameter fault The last received parameter data from the Master Unit have been rejected. The parameter data in the
slave device differ from the parameter sent by the Master Unit.
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