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

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CHAPTER 3: USING THE SNAP ETHERNET I/O DRIVER TOOLKIT O22SnapIoMemMap C++ Class Examples The Driver Toolkit also includes the following examples, which use the core C++ code. See “Using Visual C++ with the Core C++ Code” on page 52 for more information. Environment Visual C++ 6 Linux Example Name Digital Bank Any rack with digital points Use with Description O22SnapIoStream C++ Class Examples The toolkit also includes the following examples, which use the core C++ code. See “Using Visual C++ with the Core C++ Code” on page 52 for more information. Environment Visual C++ 6 Digital Bank Console Any rack with digital points 54 SNAP Ethernet-Based I/O Units Protocols and Programming Guide Identical to the Visual C++ 6.0 ActiveX Digital Bank example, except that it uses the core C++ class, O22SnapIoMemMap, instead of the OptoSnapIoMemMapX ActiveX component. A simple Win32 console application. It takes one command-line parameter, an IP address, and prints out the state of the digital bank area of the Ethernet-based brain at that address. Eiocon Any rack Creates a small shell environment that lets a user issue commands to read and write to a brain. Eiocl Any rack A command line tool for reading or writing values to a brain. Can also process a file of commands. Useful as a standalone tool. Eiocon Any rack Creates a small shell environment that lets a user issue commands to read and write to a brain. Eiocl Any rack A command line tool for reading or writing values to a brain. Can also process a file of commands. Useful as a standalone tool. Example Name Eiocon Any brain with streaming turned on Linux Eiocon Any brain with streaming turned on Use with Description Identical to the Eiocon MemMap example shown above. Includes a mode (the “ls” command) for catching and printing stream packets. Identical to the Eiocon MemMap example shown above. Includes a mode (the “ls” command) for catching and printing stream packets.
MemMap Example Code CHAPTER 3: USING THE SNAP ETHERNET I/O DRIVER TOOLKIT This section gives a few examples of how to use the OptoSnapIoMemMapX ActiveX component to connect to and communicate with the Ethernet-based brain. The same principles would apply to the OptoSnapIoMemMap C++ class. All example code is written with Microsoft Visual Basic. The interesting code is in boldface. For more example code, see the example files listed in the previous section. Create the OptoSnapIoMemMapX Component Define a global instance of the component and create it in a function. For example: Public gBrain As OptoSnapIoMemMapX Sub Main() Set gBrain = New OptoSnapIoMemMapX End Sub Open a Connection to the Brain Use methods OpenEnet() and IsOpenDone() to create a connection to the brain. For example: Dim nResult As Long ' Attempt to open the brain... nResult = gBrain.OpenEnet("10.192.54.0", 2001, 10000, 1) ' Check the result If (nResult = SIOMM_OK) Then ' Keep calling IsOpenDone() until we succeed, time-out, or error nResult = gBrain.IsOpenDone() While (nResult = SIOMM_ERROR_NOT_CONNECTED_YET) ' let other tasks get some CPU DoEvents ' Check the status of the open operation nResult = gBrain.IsOpenDone() ' keep trying Wend End If Close the Connection to the Brain Use the Close () method. For example: gBrain.Close () SNAP Ethernet-Based I/O Units Protocols and Programming Guide 55
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SNAP ETHERNET-BASED I/O UNITS PROTO
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Table of Contents Chapter 1: Introd
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Non-velocity Algorithms............
Page 7 and 8:
Disconnecting......................
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Data Logging Configuration—Read/W
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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
Page 55 and 56: CHAPTER 3 Chapter 3 Using the SNAP
Page 57 and 58: CHAPTER 3: USING THE SNAP ETHERNET
Page 63: Environment Visual Basic 6 Internet
Page 71 and 72: Return Values CHAPTER 3: USING THE
Page 73 and 74: IsOpenDone V Close V Return Values
Page 75 and 76: Digital Point Methods CHAPTER 3: US
Page 77 and 78: SetDigBankOnMask V [in] long nPts63
Page 79 and 80: Analog Bank Methods CHAPTER 3: USIN
Page 81 and 82: GetStatusWatchdogTime [out] long pn
Page 87 and 88: GetLastStreamStandardBlock (ActiveX
Page 89 and 90: CHAPTER 4 Chapter 4 Using the IEEE
Page 91 and 92: CHAPTER 4: USING THE IEEE 1394-BASE
Page 93 and 94: Bytes 0-3 Bytes 4-7 Bytes 8-11 Byte
Page 95 and 96: Bytes 0-3 Bytes 4-7 Bytes 8-11 The
Page 97 and 98: Bytes 0-3 Bytes 4-7 Bytes 8-11 Byte
Page 99 and 100: Read and clear latches for individu
Page 101 and 102: Scaling CHAPTER 4: USING THE IEEE 1
Page 103 and 104: Read and Write Packet Structure Par
Page 109 and 110: CHAPTER 5 Chapter 5 Advanced Modbus
Page 111 and 112: CHAPTER 5: ADVANCED MODBUS PROGRAMM
Page 113 and 114: 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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