41-621.1 HART
®
to Modbus
®
Adaptor Operating Manual 3
TABLE OF CONTENTS
INTRODUCTION ............................................................................................................................ 5
QUICK START PROCEDURE .......................................................................................................... 8
SETUP PROCEDURES .................................................................................................................... 9
1. CONFIGURING COMMUNICATIONS SETTINGS IN THE HMA ........................................................... 9
2. READING AND WRITING REGISTERS IN THE HMA ....................................................................... 12
3. USING A DTM WITH THE HMA ................................................................................................... 16
4. USING A HANDHELD FIELD COMMUNICATOR WITH THE HMA .................................................... 17
5. BASIC MODBUS RTU COMMUNICATION OVER RS-485 ................................................................ 18
6. BASIC MODBUS RTU COMMUNICATION OVER RS-232 ................................................................ 19
7. BASIC MODBUS ASCII COMMUNICATION OVER RS-485 .............................................................. 20
8. MODBUS RTU COMMUNICATION IN HMA MODE ....................................................................... 22
9. MODBUS RTU COMMUNICATION IN DEVICE MODE ................................................................... 26
10. MODBUS RTU COMMUNICATION IN SINGLE MODBUS DEVICE MODE ......................................... 29
11. BASIC LEVELMASTER COMMUNICATION .................................................................................... 31
12. ADDITIONAL LEVELMASTER COMMANDS ................................................................................... 37
13. AUTO SWITCHING BETWEEN MODBUS RTU/ASCII AND HART OVER RS-485 COMMUNICATION .... 42
14. AUTO SWITCHING BETWEEN LEVELMASTER AND HART OVER RS-485 COMMUNICATION ............ 46
15. HMA DIAGNOSTICS ................................................................................................................... 51
16. EMERSON ROC 800 ................................................................................................................... 55
17. ABB TOTALFLOW XRC – MODBUS RTU / ASCII ............................................................................ 64
18. ABB TOTALFLOW XRC – LEVELMASTER ...................................................................................... 81
19. THERMOSCIENTIFIC AUTOPILOT PRO – MODBUS RTU / ASCII ..................................................... 93
APPENDICES .............................................................................................................................. 103
A. HMA TERMINAL BLOCK LAYOUT .............................................................................................. 103
B. HMA DIP SWITCH SETTINGS .................................................................................................... 104
C. HMA LED INDICATORS ............................................................................................................ 104
D. HMA SYSTEM CONNECTION DIAGRAM .................................................................................... 105
E. NOMENCLATURE TABLE .......................................................................................................... 105
F. MODBUS RTU COMMUNICATION REGISTERS ........................................................................... 106
G. MODBUS ASCII COMMUNICATION REGISTERS ......................................................................... 107
H. LEVELMASTER COMMUNICATION REGISTERS .......................................................................... 108
I. HART OVER RS485 COMMUNICATION REGISTERS .................................................................... 109
J. HMA DIAGNOSTICS MODBUS REGISTERS ................................................................................. 110
K. HMA DEVICE INFORMATION MODBUS REGISTERS.................................................................... 111
L. MODEL 706, MODEL JM4 MODBUS REGISTERS ........................................................................ 112
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