KROHNE MFC 010 C Converter - Manual (Page 3)

MFC010 Interface Manual 1
Contents
1. Introduction 5
2. Mechanical Installation 5
3. Electrical Installation 6
3.1 Electrical Input Specifications for the MFC010 6
3.2 Recommended Cable Specification 7
3.3 Connection to the MFC010 8
3.4 Connection to the Modbus Bus 10
3.5 Installation Guidelines for Electromagnetic Compatibility 12
4. Installation in Hazardous Area Applications 13
4.1 Power Supply Barrier Devices 15
4.2 Modbus Barrier Devices 16
4.3 Connection To The Modbus Bus 17
5. Modbus Protocol Interface 19
5.1 Character Transmission Format 19
5.2 Modbus Telegram Format 20
5.3 Data Types in Modbus 20
5.4 Multidrop Operation 21
5.5 Calculating Data Transmission Rates 21
5.6 Error Messages in Modbus 22
6. Modbus Functions Supported by the MFC010 23
6.1 01 (01
16
): Read Coil Status 23
6.2 02 (02
16
): Read Discrete Input 24
6.3 03 (03
16
): Read Holding Registers 25
6.4 04 (04
16
): Read Input Registers 26
6.5 05 (05
16
): Force Single Coil 27
6.6 06 (06
16
): Preset Single Register 28
6.7 07 (07
16
): Read Exception Status 29
6.8 08 (08
16
): Diagnostics 30
6.9 11 (0B
16
): Fetch Comm. Event Counter 30
6.10 16 (10
16
): Preset Multiple Registers 31
6.11 17 (11
16
): Report Slave ID 32
7. MFC010 Modbus Data Model 33
7.1 MFC010 Register Structure 33
7.2 Discrete Status Output “Coil” Registers 39
7.3 Discrete Input (Binary) Status Registers 41
7.4 Input Registers 43
7.5 Holding Registers 49
8. MFC010 Operations 71
8.1 Mass Flow Zero Calibration 71
8.2 Density Calibration 72
8.3 Fixed and Referred Density Operation 75
8.4 Concentration Measurement 76
8.5 Using the System Protection Passwords 76
8.6 Saving and Restoring Configuration settings 77
8.7 Implementing User Defined Units 77
8.8 Using the Internal Process Control Mechanism 78
8.9 Custody Transfer Applications 78
8.10 Pressure Suppression 79