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ABB Manuals
Controller
C250
User manual
ABB C250 User Manual
Control it modbus (rtu) communications option
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Contents
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Table of Contents
Table of Contents
1 Introduction
2 Electrical Installation
Host Computer Serial Communications
OPTO22 Boards for Use with Personal Computers
Two-Wire and Four-Wire Connection
Pull-Up and Pull-Down Resistors
Termination Resistor
Serial Connections
3 Configuration
Accessing the Configuration Mode
Setting the Serial Transmission Parameters
Setting the MODBUS Address
4 Modbus Protocol
Introduction
MODBUS Function Codes
5 Modbus Functions
Read Coil Status - Function Code 01
Read Holding Register - Function Code 03
Force Single Coil - Function Code 05
Preset Single Register - Function Code 06
Loopback Test - Function Code 08
Write Multiple Registers - Function Code 16
6 Exception Responses
Examples
7 Addressable Parameters
COMMANDER 250/V250 - Coils
COMMANDER 250/V250 - Registers
Analog Inputs
Control Settings
Set Points
Alarm Settings
Ramp/Soak Settings
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1
Introduction
2
Accessing the Configuration Mode
3
Configuration
4
Control Settings
5
Set Points
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User Guide
Control
IM/C250–MOD_2
MODBUS (RTU) Communications Option
C250 and V250
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V250
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