Table of Contents

1.0 Introduction

• 1.1 WLTS MODBUS Interface Overview
• 1.2 WLTS MODBUS System Components
• 1.3 Sensor Overview & Measurement Parameters
  • 1.3.1 Absolute Level
  • 1.3.2 Vented (Gauge) Level
  • 1.3.3 Temperature
• 1.4 Communication/Vented Cables
  • 1.4.1 Communication Cable Connections

2.0 WLTS Software Utility

• 2.1 Communicating with the WLTS PC Software Utility
• 2.2 Programming the Water Level Temperature Sensor

3.0 MODBUS Wiring Setup and Installation

• 3.1 MODBUS Wiring Connection
• 3.2 Installation
  • 3.2.1 Installation in a 2" Well
  • 3.2.2 Biofouling Conditions

4.0 WLTS MODBUS Operation

• 4.1 WLTS MODBUS Configuration Overview
• 4.2 WLTS MODBUS Support Functions
• 4.3 WLTS MODBUS Holding Registers
• 4.4 WLTS MODBUS Input Registers
• 4.5 WLTS MODBUS Exception Code

5.0 Maintenance and Troubleshooting

• 5.1 Maintenance
  • 5.1.1 Sensor Maintenance
    • 5.1.1.1 Changing or Updating WLTS
  • 5.1.2 Communication/Vented Cable Maintenance
• 5.2 Firmware Updates
• 5.3 Troubleshooting

6.0 Appendix: Additional MODBUS Information

7.0 References