Bronkhorst PROFIBUS-DP slave interface - Manual (Page 24)

BRONKHORST ®
8.2 T
ROUBLESHOOTING HINTS AND TIPS
PROFIBUS problems
No Communication • Check power supply and cabling.
• Check bus termination. At the beginning and end of a bus segment, termination
should be enabled in your connector or by means of any external special resistor
network.
• Check all PROFIBUS settings at your master. Master and slave settings for use of
memory modules must be the same. Select at least one module e.g. ‘Measure,
integer (read)’ otherwise there will be no data-exchange.
• Check address of interface (slave)
• Try to reset the instrument and/or restart your master.
• Make sure all settings for your slave are downloaded to your master (otherwise it
won’t work).
• Contact PROFIBUS sales representative or service department.
Flow is not reacting to
setpoint commands
• In case of PROFIBUS communication problems instrument will put it’s valve into a
safe state. This will close (NC) or open the valve fully (NO). When data exchange
between master and slave has been re-established, instrument will respond to
setpoint again. For overruling safe state via RS232 interface, see setpoint /control
modes in chapter 2.5 from doc. nr. 9.17.023, (digital instrument description).
Red Led has long flash • Make sure the requested parameters are available in the particular Bronkhorst
Profibus-DP slave.
• Delete the Profibus slave configuration and add a new slave in your software, this
will remove a corruption in the software configuration.
Page 24 PROFIBUS DP interface 9.17.025