snap ethernet-based i/o units protocols and programming guide

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SNAP Ethernet-Based I/O Units Protocols and Programming Guide Form 1465-040128—JANUARY, 2004 Copyright © 2004 Opto 22. All rights reserved. Printed in the United States of America. The information in this manual has been checked carefully and is believed to be accurate; however, Opto 22 assumes no responsibility for possible inaccuracies or omissions. Specifications are subject to change without notice. Opto 22 warrants all of its products to be free from defects in material or workmanship for 30 months from the manufacturing date code. This warranty is limited to the original cost of the unit only and does not cover installation, labor, or any other contingent costs. Opto 22 I/O modules and solid-state relays with date codes of 1/96 or later are guaranteed for life. This lifetime warranty excludes reed relay, SNAP serial communication modules, SNAP PID modules, and modules that contain mechanical contacts or switches. Refer to Opto 22 form number 1042 for more details. Opto 22 FactoryFloor, Cyrano, Optomux, and Pamux are registered trademarks of Opto 22. Generation 4, ioControl, ioDisplay, ioManager, ioProject, ioUtilities, mistic, OptoConnect, OptoControl, OptoDisplay, OptoENETSniff, OptoOPCServer, OptoScript, OptoServer, OptoTerminal, OptoUtilities, SNAP Ethernet I/O, SNAP I/O, SNAP OEM I/O, SNAP Simple I/O, SNAP Ultimate I/O, and SNAP Wireless LAN I/O are trademarks of Opto 22. ActiveX, JScript, Microsoft, MS-DOS, VBScript, Visual Basic, Visual C++, and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and other countries. Linux is a registered trademark of Linus Torvalds. Unicenter is a registered trademark of Computer Associates International, Inc. ARCNET is a registered trademark of Datapoint Corporation. Modbus is a registered trademark of Schneider Electric. Wiegand is a registered trademark of Sensor Engineering Corporation. Nokia, Nokia M2M Platform, Nokia M2M Gateway Software, and Nokia 31 GSM Connectivity Terminal are trademarks or registered trademarks of Nokia Corporation. All other brand or product names are trademarks or registered trademarks of their respective companies or organizations. ii SNAP Ethernet-Based I/O Units Protocols and Programming Guide
Table of Contents Chapter 1: Introduction................................................................................ 1 Welcome to SNAP Ethernet-Based I/O..................................................................................1 Hardware.........................................................................................................................1 Software..........................................................................................................................2 About this Guide.....................................................................................................................3 Information Key ...............................................................................................................4 Other Documents You May Need ...................................................................................4 For Help ..................................................................................................................................5 SNAP Ethernet-Based Brain Comparison Chart.....................................................................6 Understanding Communication with the I/O Unit..................................................................8 Choosing Communication Methods ................................................................................8 Accessing SNAP Ethernet-Based I/O Units Over the Internet........................................9 Special Notes for SNAP Ultimate I/O Units....................................................................9 The I/O Side of the Brain........................................................................................10 The Control Side of the Brain.................................................................................10 Using the Two Sides ..............................................................................................10 Chapter 2: Overview of Programming ......................................................11 Introduction ..........................................................................................................................11 Understanding the Brain’s Memory Map.............................................................................12 Referencing SNAP I/O Points...............................................................................................13 Analog and Digital Systems (Except N Brains) .............................................................13 Analog and Digital Systems (N Brains).........................................................................15 Analog and Simple Digital Systems..............................................................................16 Digital-Only Systems.....................................................................................................17 Configuring I/O Points ..........................................................................................................18 I/O Module Types..........................................................................................................18 I/O Point Types ..............................................................................................................19 SNAP Ethernet-Based I/O Units Protocols and Programming Guide iii
Page 1: SNAP ETHERNET-BASED I/O UNITS PROTO
Page 5 and 6: Non-velocity Algorithms............
Page 7 and 8: Disconnecting......................
Page 9 and 10: Data Logging Configuration—Read/W
Page 11 and 12: Chapter 1 Introduction CHAPTER 1 We
Page 13 and 14: About this Guide CHAPTER 1: INTRODU
Page 15 and 16: For Help CHAPTER 1: INTRODUCTION If
Page 17 and 18: FEATURE CHAPTER 1: INTRODUCTION Ema
Page 19 and 20: CHAPTER 1: INTRODUCTION This task C
Page 21 and 22: CHAPTER 2 Chapter 2 Overview of Pro
Page 23 and 24: Referencing SNAP I/O Points CHAPTER
Page 25 and 26: Analog and Digital Systems (N Brain
Page 27 and 28: Digital-Only Systems The following
Page 29 and 30: I/O Point Types CHAPTER 2: OVERVIEW
Page 31 and 32: CHAPTER 2: OVERVIEW OF PROGRAMMING
Page 33 and 34: Watchdog (Digital and Analog Points
Page 45 and 46: Streaming Data CHAPTER 2: OVERVIEW
Page 47 and 48: Logging Data Area Number of Bytes I
Page 49 and 50: Using PID Loops What is a PID? CHAP
Page 51 and 52: Equations Common to All Algorithms
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CHAPTER 2: OVERVIEW OF PROGRAMMING
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CHAPTER 3 Chapter 3 Using the SNAP
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CHAPTER 3: USING THE SNAP ETHERNET
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Environment Visual Basic 6 Internet
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MemMap Example Code CHAPTER 3: USIN
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Return Values CHAPTER 3: USING THE
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IsOpenDone V Close V Return Values
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Digital Point Methods CHAPTER 3: US
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SetDigBankOnMask V [in] long nPts63
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Analog Bank Methods CHAPTER 3: USIN
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GetStatusWatchdogTime [out] long pn
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GetLastStreamStandardBlock (ActiveX
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CHAPTER 4 Chapter 4 Using the IEEE
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CHAPTER 4: USING THE IEEE 1394-BASE
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Bytes 0-3 Bytes 4-7 Bytes 8-11 Byte
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Bytes 0-3 Bytes 4-7 Bytes 8-11 The
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Bytes 0-3 Bytes 4-7 Bytes 8-11 Byte
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Read and clear latches for individu
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Scaling CHAPTER 4: USING THE IEEE 1
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Read and Write Packet Structure Par
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CHAPTER 5 Chapter 5 Advanced Modbus
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CHAPTER 5: ADVANCED MODBUS PROGRAMM
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APPENDIX A Appendix A SNAP Ethernet
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Status Area Read—Read Only This i
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Date and Time Configuration—Read/
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Security Configuration—Read/Write
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Serial Module Configuration—Read/
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Wiegand Serial Module Configuration
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SNMP Configuration—Read/Write (Do
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Starting Address Length Type Descri
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Digital Point Read—Read Only NOTE
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Analog Point Read—Read Only See
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Analog and Digital Point Configurat
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Digital Events and Reactions—Read
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Analog Point Calculation and Set—
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Analog Read and Clear/Restart—Rea
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Serial Event Configuration—Read/W
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Data Log—Read/Write (Does not app
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Appendix B Table of Offsets Introdu
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Module Point (Decimal) Point (Hex)
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Index A access, setting up SNMP sec
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error codes IEEE 1394-based protoco
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O off-latch, 20 offset, 24 IEEE 139
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