Contents

Section 1.

Introduction

1-1

1.1

What is the SDM-SIO4?

1-1

1.2

Specifications

1-3

 

1.2.1

Serial Ports

1-3

 

1.2.2 SDM Port

1-4

 

1.2.3

Case

1-4

 

1.2.4

Power Requirements

1-4

 

1.2.5

Environmental Operating Range

1-4

 

1.2.6

Other Key Features

1-5

Section 2.

Installation and Hardware Set-Up

2-1

2.1

Setting the SDM Address

2-1

2.2

Selecting RS232 or 5V Logic for Each Port

2-2

2.3

Connections to the SDM-SIO4

2-2

 

2.3.1

Transient Protection and Grounding

2-2

2.4

Power-on Tests — the Status LED

2-3

Section 3. Understanding How the SDM-SIO4 Handles

 

 

Data

3-1

3.1

Introduction

3-1

 

3.1.1

Method of Entering Special / Control Characters

3-1

3.2

Input Filters

3-2

 

3.2.1

Filter Types

3-2

3.3

Output Formatting

3-5

 

3.3.1

Simple Output Formatter

3-5

 

3.3.2

String Output Formats

3-6

Section 4. Programming the SDM-SIO4

4-1

4.1

Command Line Operation and Structure

4-1

4.2

Entering Commands

4-1

4.3

Basic Commands

4-2

4.4

Advanced Commands

4-3

Section 5. Programming the SDM-SIO4

5-1

5.1

Instruction 113 Parameters

5-1

 

5.1.1 Parameter 1 — Reps

5-1

 

5.1.2 Parameter 2 — Address

5-1

 

5.1.3 Parameter 3 — Mode

5-1

 

5.1.4 Parameters 4, 5 and 6 — SDM-SIO4 Command

5-1

 

5.1.5 Parameter 7 — Values per Rep

5-2

 

5.1.6

Parameter 8 — Starting Input Location

5-2

 

5.1.7

Parameters 9 and 10 — Multiplier and Offset

5-2

5.2

Commands and Options (Parameters 4, 5 and 6)

5-2

 

5.2.1

Understanding Parameter Options and Returned Values

5-3

 

5.2.2

Command 1: Poll of Available Data

5-3

 

5.2.3 Command 2: Signatures

5-4

 

5.2.4

Command 3: Flush all Receive Buffers

5-4

 

5.2.5 Command 4: Send Data to Datalogger

5-4

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Campbell Hausfeld SDM-SIO4 manual Contents