Table of Contents

1.0 Introduction

• 1.1 MODBUS Interface Overview
• 1.2 LED Status

2.0 AquaVent Independent Recording Option

• 2.1 Data Downloading and Programming in Field

3.0 AquaVent MODBUS Installation

• 3.1 Setting the MODBUS Device Address
• 3.2 Wiring Overview
  • 3.2.1 RS-232 Connection
  • 3.2.2 RS-485 Connection
• 3.3 AquaVent Setup and Startup
  • 3.3.1 AquaVent Setup
  • 3.3.2 AquaVent Startup Notes

4.0 AquaVent MODBUS Operation

• 4.1 AquaVent MODBUS Configuration Overview
• 4.2 AquaVent MODBUS Data Types
• 4.3 AquaVent Supported MODBUS Functions
• 4.4 AquaVent MODBUS Register Map
• 4.5 AquaVent MODBUS Status and Diagnostic Codes
  • 4.5.1 Device Status
  • 4.5.2 Diagnostic Tests
  • 4.5.3 Exception Response Codes

5.0 Maintenance and Troubleshooting

• 5.1 Maintenance
  • 5.1.1 Changing or Updating AquaVent Loggers
  • 5.1.2 Changing SPX Wellhead Batteries
  • 5.1.3 Firmware Upgrades
• 5.2 Troubleshooting

6.0 Appendix: Additional MODBUS Information

• 6.1 Endian Order and Byte Packing
• 6.2 AquaVent Register Offset Assumptions

7.0 References