Document Outline

• Revision and Copyright Information
• Warranty and Assistance
• Table of Contents
• Section 1. Introduction
  • 1.1 What is the SDM-SIO4?
  • 1.2 Specifications
    • 1.2.1 Serial Ports
      • Serial Port Buffers
    • 1.2.2 SDM Port
    • 1.2.3 Case
    • 1.2.4 Power Requirements
    • 1.2.5 Environmental Operating Range
    • 1.2.6 Other Key Features
  • 1.3 ‘Talk-Through’ Mode
• Section 2. Installation and Hardware Set-Up
  • 2.1 Setting the SDM Address
  • 2.2 Selecting RS232 or 5V Logic for Each Port
  • 2.3 Connections to the SDM-SIO4
    • 2.3.1 Transient Protection and Grounding
  • 2.4 Power-on Tests — the Status LED
• Section 3. Understanding How the SDM-SIO4 Handles Data
  • 3.1 Introduction
    • 3.1.1 Method of Entering Special / Control Characters
  • 3.2 Input Filters
    • 3.2.1 Filter Types
      • Simple Filters
      • Filter Strings
      • Predefined Filter Strings
  • 3.3 Output Formatting
    • 3.3.1 Simple Output Formatter
    • 3.3.2 Output Format Strings
      • CR10X Program Example
• Section 4. Programming the SDM-SIO4
  • 4.1 Command Line Operation and Structure
  • 4.2 Entering Commands
  • 4.3 Basic Commands
    • fltst [string number] ["filter definition"]
    • strst [string number] ["string definition"]
    • fmtst [string number] ["format definition"]
    • strdelete [string number]
    • strrd [string number]
    • exit
  • 4.4 Advanced Commands
    • version
    • portset [port#] [baud#] [data length] [stop bits] [parity] [handshake mode] [delay]
    • reset
    • ramtest
    • changeport [port #]
    • status
    • hexdump [start address] [number of bytes]
    • lasterror
    • errorres
    • bytewr [address] [byte]
    • testio [test#]
• Section 5. Programming the Datalogger
  • 5.1 Instruction 113 Parameters
    • 5.1.1 Parameter 1 — Reps
    • 5.1.2 Parameter 2 — Address
    • 5.1.3 Parameter 3 — Mode
    • 5.1.4 Parameters 4, 5 and 6 — SDM-SIO4 Command
    • 5.1.5 Parameter 7 — Values per Rep
    • 5.1.6 Parameter 8 — Starting Input Location
    • 5.1.7 Parameters 9 and 10 — Multiplier and Offse
  • 5.2 Commands and Options (Parameters 4, 5 and 6)
    • 5.2.1 Understanding Parameter Options and Returned Values
    • 5.2.2 Command 1: Poll of Available Data
    • 5.2.3 Command 2: Signatures
    • 5.2.4 Command 3: Flush all Receive Buffers
    • 5.2.5 Command 4: Send Data to Datalogger
    • 5.2.6 Command 5: Status
    • 5.2.7 Command 6: Flush Transmit Buffer
    • 5.2.8 Command 7: Activate Command Line
    • 5.2.9 Command 8: Poll Tx Buffers for Data
    • 5.2.10 Command 9: Flush Converted Data Buffer
    • 5.2.11 Command 66: Send Single-Byte Data to Datalogger
    • 5.2.12 Command 67: Get Return Code
    • 5.2.13 Command 320: Send Byte Data to SDM-SIO4
    • 5.2.14 Command 321: Execute Command Line Command
      • Program Example for P113 Command 321
    • 5.2.15 Command 1024: Send String to Device
    • 5.2.16 Command 1025: Transmit a Byte
    • 5.2.17 Command 1026: Serial Port Status
      • First Value Returned
      • Second Value Returned
      • Third Value Returned
      • Fourth Value Returned
      • First Command Option — Reset Error Counters
    • 5.2.18 Command 1027: ‘Manual’ Handshake Mode
    • 5.2.19 Command 2049: Set Communications Parameters
      • First Command Option (Parameter 5)
      • Second Command Option (Parameter 6)
    • 5.2.20 Command 2054: Set Up Receive Filter
      • First Command Option (Parameter 5)
    • 5.2.21 Command 2304: Transmit String and/or Data to Device (Formatter/Filter)
      • First Command Option (Parameter 5)
      • Second Command Option (Parameter 6)
      • String Number or Character Code
    • 5.2.22 Command 2305: Transmit Byte(s)
  • 5.3 SDM-SIO4 Configuration Examples
    • Example CR10X Program
    • 5.3.1 Sensors Where the Datalogger Can Request Data by Sending a Prompt or Using a Handshaking Line
      • Example CR10X Program Using Instruction P113 Command 4
    • 5.3.2 Sensors Which Send Data Out Without Prompting
      • Example CR10X Program without Polling or Interrupts
      • Example CR10X Program using the Polling Method
      • Example CR10X Program using Interrupts
  • 5.4 Outputting Datalogger Data
  • 5.5 Flushing the Input and Output Buffers
  • 5.6 Return Error Codes
• Section 6. Data Error Detection
  • 6.1 Error Detection with the SDM-SIO4
  • 6.2 Received Data
    • 6.2.1 Example of Using Received Data Filters
    • 6.2.2 CR10X Program Example
  • 6.3 Transmitted Data
    • 6.3.1 Example of Using Transmitted Data Filters
    • 6.3.2 CR10X Program Example
    • 6.3.3 Alternative CR10X Program
• Appendix A. ASCII Table
• Appendix B. Serial Port Data Transfer Modes
  • B.1 Baud rates
  • B.2 Stop Bits
  • B.3 Data Length
  • B.4 Parity Bits
  • B.5 Serial Handshake Modes
• Appendix C. Limitations of the Talk-Through Mode
  • C.1 Limitations
• Campbell Scientific Contact Information