70
PROFIBUS-DP Master DTM
Section 3-3
• Master Status tab.
• Slave Status tab.
• Error History tab.
Also in the Monitor tab, the method of Diagnostics data refreshing can be
selected.
• Automatic
The Diagnostics data is constantly retrieved from the Unit.
• Manual
Retrieving the Diagnostics data from the Unit is done when pressing the
Manual button.
Master Status Tab The Master Status tab (shown in the figure above) contains Diagnostics infor-
mation regarding the Master Status. Each of the four status boxes, is related
to one of the Unit’s status words in the PLC CIO Area Memory (see sections
4-2-3 Unit Status (Word n+4)
to
4-2-6 Slave Status (Word n+7)
).
The status is indicated by red or green LED indicators. Red indicates an error
situation, green indicates a status indication. The LED indicators are listed in
the table below.
LED Indicator Description
Master Status 1
OPERATE Master Unit is in OPERATE mode.
STOP Master Unit is in STOP mode.
CLEAR Master Unit is in CLEAR mode.
OFFLINE Master Unit is in OFFLINE mode.
Data Exchange When set to ON, it indicates that the Master Unit is in Data Exchange with all its
allocated and enabled slave stations.
Auto-Clear enabled Auto-Clear function has been enabled in the downloaded configuration.
Valid Configuration The Master Unit contains a valid configuration.
Master Status 2
Disturbed Bus error When turned ON, the Disturbed Bus error indicates that distorted messages
have been received by the Unit. This may occur if the network is not properly
terminated or a cable is used, which is too long for the selected baud rate.
PROFIBUS Protocol Error When turned ON, the PROFIBUS Protocol Error indicates that an error has
occurred in the protocol handling, e.g. stations beyond the HSA have been
detected or a transmitted token frame could not be read back. The Master unit
has switched to OFFLINE.
Double Master address Error Indicates that a second Master with the same address has been detected on the
Bus. The Master Unit has switched to OFFLINE.
Hardware error When turned ON, the Hardware Error indicates that an error has occurred on
the bus, e.g. message exceeding 256 bytes, broken messages, faulty bus tim-
ing. The Master Unit has switched to OFFLINE.
Mode Command Error When set to ON, it indicates that two switches in the CIO switch word (see sec-
tion
4-2-1 Software Switches 1 (Word n)
) were set simultaneously.
Parameter error The Parameter set error indicates if an error has been detected in the contents
of the Parameters set while configuring the PROFIBUS interface, using these
parameters.
To Next Page
Loading...
