Table of Contents

Introduction

Running ModSnmp

Setup overview

Saving and restoring the settings

Modbus Interfaces

Defining Modbus Interfaces

General settings

Response Handling

32/64-bit Value Settings

Socket settings

Serial settings

Modbus Interface display

Editing Modbus Interfaces

SNMP Setup

SNMP Settings

Interface

Engine ID

Defining SNMP Users

SNMP User Display

Modbus OID Settings

Modbus Addresses

SNMP OIDs

Modbus OIDs Display

Defining Modbus OIDs

Editing Modbus OIDs

Constant OID Settings

Defining Constant OIDs

Constant OIDs Display

Editing Constant OIDs

MIB - Management Information Base

Logging

Tracing

Introduction

Modbus tracing

SNMP tracing

Running as a server

Command line options

Running under Windows

Running under Unix/Linux

Changing server settings

Troubleshooting

Introduction

SNMP

Modbus

General Communications

Socket Communications

Serial Communications

RTU Packet Type

ASCII Packet Type

TCP Packet Type

Miscellaneous

Appendix A. Screenshots

Appendix B. Modbus protocol documents

Appendix C. SNMP documents

Appendix D. Acknowledgments

SNMP4J

Apache log4j