Table of Contents

1. Introduction

1.1. Overview

1.2. Running Modsak

1.3. The GUI

1.4. Setup overview

1.5. Saving and restoring the configuration

2. Settings

2.1. General settings

2.2. Interface settings

2.3. Address mapping

2.4. 32/64-bit Value Settings

2.5. Polling Settings

2.6. Device Identification

3. Registers

3.1. Defining registers

3.2. Register Table

3.3. Reading and writing registers

3.4. Polling

3.5. Saving and restoring register definitions

4. File Registers

4.1. Defining file registers

4.2. File Register Table

4.3. Reading and writing file registers

4.4. Saving and restoring file register definitions

5. Commands

5.1. Defining commands

5.2. Command table

5.3. Viewing and editing command definitions

6. Logging

7. Tracing

7.1. Raw data tracing

7.2. Message tracing

7.3. Register value tracing

A. Troubleshooting

1. Communications

2. Master Mode

3. Slave Mode

4. Monitor Mode

5. Miscellaneous

B. Release Notes

C. Modbus protocol documents

D. CSV file format

E. Message size limits