Bosch Rexroth ID 40 Manual page 138

138/176 Web interface
Bosch Rexroth AG, MIT: ID 40, 3 842 530 344/2014-05
PROOF COPy 1 | 20.05.2014 | FOR INTERNAL USE ONLy
The web server does not automatically start communication with the MDT. This
occurs either through a commanded link state (commanded link state) on the
SLK register page or by the application to which the SLK is connected.
If you want to retrieve MDT registers or SLK registers via prefetch, add the
corresponding SLK addresses to the address ranges. See Chapter 7.4 "SLK address
table" for the address assignments.
If you want to monitor an SLK in a fieldbus application with prefetches, the
prefetches configured through the web interface work independently of those
configured via the fieldbus.
The web server's prefetch access is deactivated when you deactivate the prefetch on
the MDT data page. Fieldbus prefetches remain active and cannot be manipulated
using the web interface.
10.5.1.5 Error on the MDT data page
As with the fieldbus, the MDT has to be in the CONNECTED state to receive valid
MDT data when accessing the MDT through the web interface.
If no MDT is present during read access or invalid addresses are accessed, the web
server marks the requested address ranges with red question marks.
If the MDT data is sound, the values are displayed in dark blue.
If the read bytes come from an MDT segment with memory errors, the affected bytes
appear in red.
If the system encounters a temporary access conflict, error codes appear in the data
field in red.