Table Of Contents - ABB SM3000 User Manual

CONTENTS
1 INTRODUCTION .............................................................. 2
2 ELECTRICAL INSTALLATION ......................................... 2
2.1 Host Computer Serial Communications ............................. 2
2.2 Two-wire and Four-wire Connection .................................. 2
2.3 Pull-up and Pull-down Resistors ........................................ 3
2.4 Termination Resistor .......................................................... 3
2.5 Serial Connections ............................................................ 3
3 CONFIGURATION ............................................................ 4
3.1 Configuring Serial Communications ................................... 4
4 MODBUS PROTOCOL .................................................... 5
4.1 Modbus Commands Supported ........................................ 5
4.2 Modbus Exception Responses .......................................... 5
5 OPERATING MODE ......................................................... 5
5.1 Operating Mode Modbus Coils .......................................... 5
5.2 Operating Mode Modbus Registers ................................. 19
5.3 Comms Analog and Digital Inputs ................................... 42
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