Table Of Contents - ABB 4620 User Manual

CONTENTS
Section
1 INTRODUCTION .......................................................... 2
1.1 Electrical Connection ........................................ 2
1.2 Protocol ............................................................. 2
2 PREPARATION ............................................................ 2
2.1 Company Standard Settings ............................. 2
3 INSTALLATION ............................................................ 3
3.1 Serial Communication Adaptors
for Personal Computers .................................... 3
3.1.1 Five-wire Configuration ....................... 3
3.1.2 Three-wire Configuration ..................... 3
4 ELECTRICAL CONNECTIONS ................................... 3
4.1 Serial Connections ............................................ 3
4.1.1 Five-wire Cable .................................... 3
4.1.2 Three-wire Cable ................................. 3
5 SETTING UP ................................................................ 5
5.1 Termination Resistors ........................................ 5
6 PROGRAMMING .......................................................... 6
6.1 Serial Interface Page ......................................... 6
7 MODBUS PROTOCOL ................................................ 7
7.1 Introduction to Modbus Protocol
(RTU only) ......................................................... 7
7.2 Modbus Function Codes ................................... 7
8 MODBUS FUNCTIONS ................................................ 8
8.1 Read Coil Status
- Function Code 01 ........................................... 8
8.1.1 Read Coil Status Query ....................... 8
8.1.2 Read Coil Status Response ................ 8
8.2 Read Holding Register
- Function Code 03 ........................................... 8
8.2.1 Read Holding Register Query ............. 8
8.2.2 Read Holding Register Response ....... 9
8.3 Force Single Coil
- Function Code 05 ........................................... 9
8.3.1 Force Single Coil Query ...................... 9
8.3.2 Force Single Coil Response ................ 9
8.4 Preset Single Register
- Function Code 06 ......................................... 10
8.4.1 Preset Single Register Query ............ 10
8.4.2 Preset Single Register Response ..... 10
8.5 Loopback Test
- Function Code 08 ......................................... 11
8.5.1 Loopback Test Query ......................... 11
8.5.2 Loopback Test Response .................. 11
8.6 Preset Multiple Registers
- Function Code 16 ......................................... 11
8.6.1 Preset Multiple
Registers Query ................................. 11
8.6.2 Preset Multiple
Registers Response .......................... 11
Page Section
9 EXCEPTION RESPONSES ....................................... 12
9.1 Examples ......................................................... 12
10 MODBUS COILS AND REGISTERS ......................... 12
10.1 Conductivity Transmitters
Models 4620/25 ............................................... 12
10.1.1 Coils ................................................... 12
10.1.2 Holding Registers .............................. 13
10.2 Conductivity Transmitters Multi-electrode
Versions Models 4621/26 ................................ 14
10.2.1 Coils ................................................... 14
10.2.2 Holding Registers .............................. 14
10.3 Conductivity Transmitters to meet USP
Regulations Models 4623/28 .......................... 15
10.3.1 Coils ................................................... 15
10.3.2 Holding Registers .............................. 15
10.4 pH Transmitters
Models 4630/35 and 4631/36 ......................... 16
10.4.1 Coils ................................................... 16
10.4.2 Holding Registers .............................. 17
10.5 Dissolved Oxygen Analyzers
Models 4640/45 and 4642/47 ......................... 18
10.5.1 Coils ................................................... 18
10.5.2 Holding Registers .............................. 18
10.6 Low Level Dissolved Oxygen Analyzers
Models 4641/46 ............................................... 19
10.6.1 Coils ................................................... 19
10.6.2 Holding Registers .............................. 19
10.7 Turbidity Analyzers
Models 4670 and 4675 .................................... 20
10.7.1 Coils ................................................... 20
10.7.2 Holding Registers .............................. 20
10.8 Biocide Cleaning Control (4691) ..................... 21
10.8.1 Coils ................................................... 21
10.8.2 Holding Registers .............................. 21
11 OPERATION ............................................................... 22
12 SPECIFICATION ........................................................ 24
APPENDICES ..................................................................... 24
A1 Non-volatile Memory Limitations ..................... 24
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