Document Outline

• Table of Contents
• Chapter 1. Introduction
  • 1.1. Audience
  • 1.2. Comtrol Modbus Solutions
  • 1.3. Product Overview
  • 1.4. Modbus/TCP Firmware
    • 1.4.1. Traditional Modbus/TCP System Architecture (Firmware V2.x)
    • 1.4.2. Enhanced Modbus/TCP System Architecture (Firmware 3.x)
    • 1.4.3. Advanced Modbus System Architecture (Firmware 5.x)
    • 1.4.4. Modbus/TCP Multi-Mode Connectivity
      • 1.4.4.1. PLC Master/DeviceMaster UP Slave Mode
      • 1.4.4.2. PLC Slave/DeviceMaster UP Master Mode
      • 1.4.4.3. Dual Master (Virtual Peer-to-Peer) - Write Mode
      • 1.4.4.4. Dual Master (Virtual Peer-to-Peer) - Read Mode (Dual Polling)
      • 1.4.4.5. Filtering and Data Extraction Functionality (Patent Pending)
  • 1.5. Definitions and Terms
    • 1.5.1. Data Type Definitions
    • 1.5.2. Glossary
  • 1.6. Locating Updated Software and Documents
  • 1.7. Modbus/TCP Application Setup
• Chapter 2. Programming Interface
  • 2.1. Overview
    • 2.1.1. Modbus Master Requirements
    • 2.1.2. What is Modbus/RTU?
    • 2.1.3. What is Modbus/ASCII?
    • 2.1.4. What is Modbus/TCP?
  • 2.2. Raw Data Interface
    • 2.2.1. Supported Modbus Messages
    • 2.2.2. Serial Port Raw/ASCII Interface
    • 2.2.3. Ethernet Device Raw/ASCII Interface
    • 2.2.4. Raw/ASCII Transfer Modes
      • 2.2.4.1. Data-Stream Mode
      • 2.2.4.2. Command/Response Mode
    • 2.2.5. Receive Data Message (Raw Data)
      • 2.2.5.1. Format
      • 2.2.5.2. Communication Methodology (Receive Raw Data in Slave Mode)
      • 2.2.5.3. Communication Methodology (Receive Data Master Mode)
    • 2.2.6. Transmit Data Message (Raw Data)
      • 2.2.6.1. Format
      • 2.2.6.2. Communication Methodology (Transmit Raw Data Slave Mode)
      • 2.2.6.3. Communication Methodology (Transmit Data Master Mode)
    • 2.2.7. Sequence Number Messages (Raw Data)
  • 2.3. I/O Scanner (Raw Data)
  • 2.4. Modbus/RTU and Modbus/ASCII To-Slaves Protocol Interface
    • 2.4.1. Communication Methodology
    • 2.4.2. Modbus Slave Device Search Methodology
  • 2.5. Retrieve Statistics Message
• Chapter 3. Embedded Configuration Pages
  • 3.1. Overview
  • 3.2. Embedded Web Pages Overview
  • 3.3. Serial Device Configuration Page
    • 3.3.1. Edit Serial Port Configuration Page
    • 3.3.2. Serial Configuration
    • 3.3.3. General Protocol Settings
    • 3.3.4. Modbus Slave and Raw-Data Device Settings
    • 3.3.5. Serial Port Packet ID Settings (Raw-Data Only)
  • 3.4. Ethernet Device Configuration Page
  • 3.5. Edit Socket Port Configuration Page
    • 3.5.1. Device TCP Connection Configuration
    • 3.5.2. Socket Packet ID Settings
  • 3.6. Common Configuration Areas (Serial or Ethernet Device)
    • 3.6.1. Serial Modbus Master and Modbus/TCP Settings
    • 3.6.2. Modbus/TCP Master Rx/Tx Settings
    • 3.6.3. Filtering/Data Extraction Configuration
    • 3.6.4. Application TCP Connection Configuration
    • 3.6.5. Saving Port Options
  • 3.7. Edit Network Configuration Page
  • 3.8. Edit Security Configuration Page
    • 3.8.1. Client Authentication
    • 3.8.2. Configuring Security
• Chapter 4. Diagnostic and Statistics Pages
  • 4.1. Communication Statistics
  • 4.2. PLC Interface Diagnostics
  • 4.3. Display All Modbus Slave Devices
  • 4.4. Display Serial Logs
  • 4.5. Display Ethernet Device Logs
• Chapter 5. Alias Device ID Functionality
  • 5.1. Overview
  • 5.2. Alias Modbus Device ID Configuration/Status
    • 5.2.1. Alias Modbus Device ID Configuration/Status Page
    • 5.2.2. Add/Modify Alias Device ID Configuration Page
    • 5.2.3. Edit Alias Device ID Configuration Page
    • 5.2.4. Delete Alias Device ID Configuration Page
    • 5.2.5. Delete All Alias Device ID Configurations Page
• Chapter 6. Troubleshooting and Technical Support
  • 6.1. Troubleshooting Checklist
  • 6.2. General Troubleshooting
  • 6.3. Technical Support
• Appendix A. Programming the PLC via Concept
  • A.1. Overview
    • A.1.1. What is Concept?
    • A.1.2. Requirements
    • A.1.3. Example Program Considerations (Raw Data)
  • A.2. Concept Program Screens
    • A.2.1. Processor and Ethernet Setup
    • A.2.2. Message Screens
      • A.2.2.1. Read Serial Data via Read Holding Registers Message
      • A.2.2.2. Transmit Serial Data via Write Multiple Registers Message
      • A.2.2.3. Set Receive Sequence Number via Write Multiple Registers Message
      • A.2.2.4. Set Transmit Sequence Number via Write Multiple Registers Message
      • A.2.2.5. Read Serial Port Statistics via Read Holding Registers Message
      • A.2.2.6. Modbus/TCP Slot/Index and DeviceMaster UP IP Address Definition
    • A.2.3. Concept Example Programs
      • A.2.3.1. LPBKCNCP
      • A.2.3.2. SCANCNCP
      • A.2.3.3. Setting up and Running the Concept Example Programs
• Appendix B. LPBKCNCP Example Program
• Appendix C. SCANCNCP Example Program