Manual
1 SAFETY INSTRUCTIONS 
4 
IFC 300
www.krohne.com 02/2011 - 4001086601 - AD IFC 300 PROFIBUS R01 en
1.1 Scope of the document
These instructions are supplementary to the signal converter Handbook. For all other data, use 
the relevant chapters of the Handbook. If you do not have this document, please contact the 
nearest office or download them from the manufacturer's internet site.
1.2 Scope of delivery
The information in this chapter only contains the data applicable to PROFIBUS communication. 
The technical data in the Handbook shall be valid in its current version, provided that it is not 
rendered invalid or replaced by this supplement.
A device for PROFIBUS communication is supplied with:
• Supplementary instructions for PROFIBUS communication
• PROFIBUS device data files (GSD) on a CD-ROM supplied with the device
1.3 Special notes
Don't switch off (power off) the signal converter immediately after manual change of parameter 
values:
• Please wait approx. 10 seconds before you switch off the signal converter after you have done 
both a parameter download via PROFIBUS or a manual change of a parameter value via the 
local display.
• Please wait approx. 15 seconds before you switch off the signal converter after you have 
carried out a "Factory Reset" (PROFIBUS "Coldstart") via PROFIBUS or local display.
"Deactivation of the Service Parameter Lock" of the signal converter via PROFIBUS:
• After writing down the service password (via PROFIBUS) the "Deactivation of the Service 
Parameter Lock" will last at least 10 minutes if the internal password timer of the signal 
converter won't be retriggered by writing this password again. The "Deactivation of the 
Service Parameter Lock" will be terminated at once by a PROFIBUS Coldstart / Warmstart or 
if the internal password timer of the signal converter elapsed.
INFORMATION!
The information in this chapter only contains the data applicable to PROFIBUS communication. 
The technical data in the Handbook shall be valid in its current version, provided that it is not 
rendered invalid or replaced by this supplement.










