Related Manuals for ABB 4620
Summary of Contents for ABB 4620
- Page 1 pH/Redox (ORP) Analyzers User Guide – Modbus Communication Supplement 4600 Series IM/4600–MOD_3...
- Page 2 Cert. No. Q 05907 As a part of ABB, a world leader in process automation technology, we offer customers application expertise, service and support worldwide. EN 29001 (ISO 9001) We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled service and support.
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Page 3: Table Of Contents
Protocol ............. 2 MODBUS COILS AND REGISTERS ......12 10.1 Conductivity Transmitters PREPARATION ............2 Company Standard Settings ......2 Models 4620/25 ..........12 10.1.1 Coils ........... 12 10.1.2 Holding Registers ......13 INSTALLATION ............3 Serial Communication Adaptors 10.2 Conductivity Transmitters Multi-electrode Versions Models 4621/26 ........ -
Page 4: Introduction
Preparation is as given in the Operating Instructions Operating Instructions, depending on the instrument type: – see Section 1, with additions as detailed in this section. • Models 4620, 4621, 4625 & 4626 Conductivity Transmitters – IM/4600–CON 2.1 Company Standard Settings •... -
Page 5: Installation
3 INSTALLATION 4 ELECTRICAL CONNECTIONS Observe the limitations outlined in the Operating Instructions – connections, apart from those serial data see Section 1. The maximum serial data transmission line communication, are made as shown in Figs. 4.3 and 4.4 of the length for both RS422 and RS485 systems is 1200m. - Page 6 …4 ELECTRICAL CONNECTIONS …4.1 Serial Connections Channel 1 Channel 2 Serial Retrans. Relay 1 Power Relay 2 Supply Common (0V) 1 – No connection 2 – Rx+ Rx– 3 – Rx– 4 – Tx+ 5 – Tx– Tx– 6 – Common (0V) A –...
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Page 7: Setting Up
5 SETTING UP For all aspects other than serial data transmission the transmitter is set up as shown in the Operating Instructions Processor Board – see Section 1. Unless otherwise requested, the instrument is despatched with a transmission rate of 9600 baud and IC22 IC23 transmission line termination resistors linked-out. -
Page 8: Programming
6 PROGRAMMING The general programming procedure is as detailed in the Operating Instructions but with an additional page Serial Interface between the pages. Set Up Outputs Electrical Cal – – – – – – – – – – – – – – – SET UP OUTPUTS SERIAL INTERFACE ELECTRICAL CAL... -
Page 9: Modbus Protocol
7 MODBUS PROTOCOL 7.1 Introduction to Modbus Protocol (RTU only) Modbus communication is based on a master and a slave arrangement. The master sends a message to one slave at a time and waits for a reply. The slave cannot accept a new message until the existing message is processed and a reply sent to the master (maximum response time 250 milliseconds). -
Page 10: Modbus Functions
8 MODBUS FUNCTIONS This section shows typical examples of Modbus function codes 01, 03, 05, 06, 08 and 16. 8.1 Read Coil Status – Function Code 01 8.1.1 Read Coil Status Query This function allows the user to obtain the ON/OFF status of logic coils used to control discrete outputs from the addressed slave only. -
Page 11: Read Holding Register Response
8 MODBUS FUNCTIONS… 8.2.2 Read Holding Register Response The addressed slave responds with its address and function code, followed by the information field. The information field contains 1 byte describing the quantity of data bytes to be returned. The contents of each register requested (DATA) is two bytes, the first byte includes the high order bits and the second the low order bits. -
Page 12: Preset Single Register - Function Code 06
…8 MODBUS FUNCTIONS 8.4 Preset Single Register – Function Code 06 8.4.1 Preset Single Register Query The preset single register allows the user to modify the contents of a holding register. Note. Function codes 5, 6 and 16 are the only messages that are recognized as valid for broadcast. Example –... -
Page 13: Loopback Test - Function Code 08
8 MODBUS FUNCTIONS 8.5 Loopback Test – Function Code 08 8.5.1 Loopback Test Query The purpose of the loopback test is to test the Modbus system, it does not affect the content of the controller. Variations in the response may indicate faults in the Modbus system. The information field contains 2 bytes for the designation of the diagnostic code followed by 2 bytes to designate the action to be taken. -
Page 14: Exception Responses
The response is an exception response sighting 'illegal data address'. To indicate that the response is a notification of an error, the most significant bit of the function code is set to 1. 10 MODBUS COILS AND REGISTERS 10.1 Conductivity Transmitters Models 4620/25 10.1.1 Coils e l i... -
Page 15: Holding Registers
10 MODBUS COILS AND REGISTERS… …10.1 Conductivity Transmitters Models 4620/25 10.1.2 Holding Registers v i t y t i v i t y t i v i t y t i ° ° ) F – v i t y t i... -
Page 16: Conductivity Transmitters Multi-Electrode Versions Models 4621/26
…10 MODBUS COILS AND REGISTERS 10.2 Conductivity Transmitters Multi-electrode Versions Models 4621/26 10.2.1 Coils l l e n i l e l i 10.2.2 Holding Registers ° ° ) F – s t i s i l s i l n i l y t i n i t... -
Page 17: Conductivity Transmitters To Meet Usp Regulations Models 4623/28
10 MODBUS COILS AND REGISTERS… 10.3 Conductivity Transmitters to meet USP Regulations Models 4623/28 10.3.1 Coils e l i 10.3.2 Holding Registers v i t y t i ° ° ) F – l l e n i t o i t –... -
Page 18: Ph Transmitters Models 4630/35 And 4631/36
…10 MODBUS COILS AND REGISTERS 10.4 pH Transmitters Models 4630/35 and 4631/36 10.4.1 Coils i l a e l i . y l... -
Page 19: Holding Registers
10 MODBUS COILS AND REGISTERS… …10.4 pH Transmitters Models 4630/35 and 4631/36 10.4.2 Holding Registers † ) ° ° ) F – ° ° ) F – n i t o i t – v i l s t l †... -
Page 20: Dissolved Oxygen Analyzers Models 4640/45 And 4642/47
…10 MODBUS COILS AND REGISTERS 10.5 Dissolved Oxygen Analyzers Models 4640/45 and 4642/47 10.5.1 Coils i l a e l i . y l 10.5.2 Holding Registers ° ° ) F °C s t i °F n i l y t i n i l y t i n i l... -
Page 21: Low Level Dissolved Oxygen Analyzers Models 4641/46
10 MODBUS COILS AND REGISTERS… 10.6 Low Level Dissolved Oxygen Analyzers Models 4641/46 10.6.1 Coils i l a e l i 10.6.2 Holding Registers ° ° ) F µ µ t i s °C s t i °F... -
Page 22: Turbidity Analyzers Models 4670 And 4675
…10 MODBUS COILS AND REGISTERS 10.7 Turbidity Analyzers Models 4670 and 4675 10.7.1 Coils e l i 10.7.2 Holding Registers y t i y t i s t i y t i y t i d i l d i l y t i y t i y t i... -
Page 23: Biocide Cleaning Control (4691)
10 MODBUS COILS AND REGISTERS 10.8 Biocide Cleaning Control (4691) 10.8.1 Coils e l i e l i e l i 10.8.2 Holding Registers ° ° ) F °C s t i °F... -
Page 24: Operation
11 OPERATION Before attempting any serial communication, first ensure that the 4600 Transmitters connected to the computer terminal or host computer by serial link are functioning correctly as individual instruments. This is achieved by connecting all analog inputs, applying the input signals and checking that the digital display reads appropriately. Ensure that the serial data connections to 4600 Transmitter have been made correctly with respect to the computer terminal, or host computer, interface. - Page 25 11 OPERATION Check that the parameters programmed in the instrument's are compatible with those of the Serial Data Communication Page computer terminal or host computer – see Section 7. If communication is still not possible or is erratic, check that the computer terminal or host computer interface has pull-up and pull-down resistors connected as shown in Figs.
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Page 26: Specification
12 SPECIFICATION APPENDICES A1 Non-volatile Memory Limitations The specification for each instrument is as detailed in the Operating Instructions for the instrument (see Section 1), with Note. If the number of write cycles to any particular the following additions: non-volatile memory register exceeds 10 write cycles, the register's contents may not be retained. - Page 27 Service and Repair Centre. – Food & Beverage – Manufacturing United Kingdom – Metals and Minerals – Oil, Gas & Petrochemical ABB Limited – Pulp and Paper Tel: +44 (0)1453 826661 Fax: +44 (0)1453 829671 Drives and Motors United States of America •...
- Page 28 ABB has Sales & Customer Support The Company’s policy is one of continuous product improvement and the right is reserved to modify the expertise in over 100 countries worldwide information contained herein without notice. www.abb.com Printed in UK (03.04) © ABB 2004 ABB Limited ABB Inc.