Document Outline

• 1. Controller Requirements and Connections
  • 1.1 Wiring Overview
  • 1.2 Power Connections
  • 1.3 SDI-12 Wiring Diagram
  • 1.4 Modbus Master RS485 Wiring Diagram
  • 1.5 Modbus Master RS232 Wiring Diagram (Converter Required)
  • 1.6 RS485 Network Guidelines
    • RS485 Rule 1
    • RS485 Rule 2
    • RS485 Rule 3
    • RS485 Rule 4
    • DB-9 Pin Diagram
• 2. SDI-12 Interface
  • 2.1 Instrument Defaults
  • 2.2 Device Identification
  • 2.3 Basic Commands
  • 2.4 Extended Commands
  • 2.5 SDI-12 Configuration File
    • 2.5.1 Connect the Communication Device and Comm Kit Software
    • 2.5.2 SDI-12 Setup
• 3. Modbus Registers—Probe
  • 3.1 Modbus Communication Setup
    • /
  • 3.2 Automatic Salinity Correction
  • 3.3 Automatic Barometric Correction
  • 3.4 Automatic Density Correction
• 4. Modbus Registers—RDO Sensor
  • 4.1 Header Registers—RDO
  • 4.2 Sensor Serial Number
  • 4.3 Sensor Status
  • 4.4 Last Factory Calibration
  • 4.5 Next Factory Calibration
  • 4.6 Warm-Up Time
  • 4.7 Fast Sample Rate
  • 4.8 Parameter Registers—RDO
  • 4.9 Calibration Registers—RDO
  • 4.10 Live Salinity Value
  • 4.11 Default Salinity Value
  • 4.12 Live Barometric Pressure
  • 4.13 Default Barometric Pressure
  • 4.14 100% Saturation Calibration Values
  • 4.15 Zero% Saturation Calibration Values
  • 4.16 Calibration Slope and Offset
  • 4.17 Calibration Procedure—RDO
    • 4.17.1 RDO Calibration Calculations
• 5. Modbus Registers—Conductivity Sensor
  • 5.1 Header Registers—Conductivity
  • 5.2 Parameter Registers—Conductivity
  • 5.3 Calibration Registers—Conductivity
    • 5.3.1 Cell Offset and Cell Constant
  • 5.4 Calibration Procedure—Conductivity
• 6. Modbus Registers—Level Sensor
  • 6.1 Header Registers
    • 6.1.1 Warm-up Time
    • 6.1.2 Fast Sample Rate
  • 6.2 Parameter Registers—Level
  • 6.3 Calibration Registers—Level
    • 6.3.1 Pressure Calculation
    • 6.3.2 Pressure Offset
    • 6.3.3 Specific Gravity
    • 6.3.4 Level Reference
    • 6.3.5 Pressure Reference
  • 6.4 Calibration Procedure—Pressure
  • 6.5 Calibration Procedure—Level
• 7. Modbus Registers – pH/ORP Sensor
  • 7.1 Header Registers
  • 7.2 Parameter Registers
  • 7.3 Calibration Registers—pH/ORP
    • 7.3.1 pH Measured Value
    • 7.3.2 ORP Measured Value
  • 7.4 Calibration Procedure—pH
  • 7.5 Calibration Procedure—ORP
    • 7.5.1 Sensor Command Timeouts
• 8. Appendix—Modbus Additional Information
  • 8.1 Modbus Tutorial
  • 8.2 Modbus Modes
  • 8.3 Protocol Overview
  • 8.4 General Message Formats
  • 8.5 RTU Message Format
    • 8.5.1 Computer (Master) Message Format
    • 8.5.2 Device (Slave) Response Format
  • 8.6 ASCII Message Format
    • 8.6.1 Computer (Master) Message Format
    • 8.6.2 Device (Slave) Response Format
  • 8.7 IP Message Format
    • 8.7.1 Computer (Master) Message Format
    • 8.7.2 Device (Slave) Message Format
  • 8.8 Data Addresses (Registers)
  • 8.9 Function Codes
  • 8.10 Standard Message Formats
    • 8.10.1 Read Holding Registers
    • 8.10.2 Write Holding Register
    • 8.10.3 Write Holding Registers
    • 8.10.4 Mask Write Register
    • 8.10.5 Report Slave ID
  • 8.11 Instrument Manufacturer Data Types
    • 8.11.1 Short
    • 8.11.2 Unsigned Short
    • 8.11.3 Long
    • 8.11.4 Unsigned Long
    • 8.11.5 Float
    • 8.11.6 Double
    • 8.11.7 Character
    • 8.11.8 String
    • 8.11.9 Time
  • 8.12 Exception Codes
  • 8.13 Extended Exception Codes
  • 8.14 Probe Register Map Layout
  • 8.15 Probe Common Registers
  • 8.16 Communication Control Registers
  • 8.17 Sensor Connection Registers
  • 8.18 Current Loop Configuration Registers
  • 8.19 Logged Record Registers
  • 8.20 Register Map Template ID
  • 8.21 Device ID
  • 8.22 Device Serial Number
  • 8.23 Manufacture Date
  • 8.24 Firmware, Boot Code, Hardware Versions
  • 8.25 Device Name
  • 8.26 Site Name
  • 8.27 Coordinates
  • 8.28 Current Time
  • 8.29 Device Status
  • 8.30 Serial Communication Configuration
  • 8.31 Baud Rates
  • 8.32 RTU Settings
  • 8.33 ASCII Settings
  • 8.34 Max Message/Response Size
  • 8.35 Message Counters
  • 8.36 Sensor Connection Registers
    • 8.36.1 Max Sensor Connections
    • 8.36.2 Sensor Connection Status
  • 8.37 Sensor Map Registers
    • 8.37.1 Sensor ID Registers
    • 8.37.2 Sensor Status Register
    • 8.37.3 Sensor Command Register
    • 8.37.4 Sensor Data Register Map Version Registers
    • 8.37.5 Sensor Data Register Map Offsets
    • 8.37.6 Sensor Data Cache Timeout
  • 8.38 Current Loop Configuration
  • 8.39 Last Logged Record Registers