KROHNE MFC 300 Modbus - Manual (Page 2)

CONTENTS
2 www.krohne.com 11/2009 - 4000744801 - AD Modbus MFC 300 R01 en
MFC 300
1 Important information 3
2 Technical data 4
2.1 General technical data ..................................................................................................... 4
2.2 Technical data of the Modbus interface (acc. to EIA standards) ..................................... 4
3 Connection in bus systems 5
4 Local configuration 6
5 Electrical connection 7
6 Modbus protocol 8
6.1 General information concerning the protocol ................................................................. 8
6.2 RTU frame format............................................................................................................. 8
6.3 Addressing........................................................................................................................ 9
6.4 Overview of supported functions...................................................................................... 9
6.5 Device identification on the Modbus interface............................................................... 10
6.6 Coil registers .................................................................................................................. 10
6.6.1 Converter controls ................................................................................................................ 10
6.6.2 Counter controls ................................................................................................................... 11
6.6.3 Start calibration functions .................................................................................................... 11
6.7 Input registers ................................................................................................................ 12
6.8 Holding registers............................................................................................................ 13
6.8.1 Counter parameters ............................................................................................................. 13
6.8.2 Process input filter parameters ........................................................................................... 14
6.8.3 Modbus parameters.............................................................................................................. 16
6.9 Diagnostics ..................................................................................................................... 16
6.10 Calibration procedures................................................................................................. 17
6.10.1 Zero Calibration .................................................................................................................. 17
6.10.2 Manual Density Calibration................................................................................................. 18
6.10.3 Single Point Density Calibration ......................................................................................... 19
6.10.4 Two Point Density Calibration............................................................................................. 20
7 Notes 21
.book Page 2 Tuesday, November 24, 2009 1:48 PM