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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
