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

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CHAPTER 3: USING THE SNAP ETHERNET I/O DRIVER TOOLKIT Create the OptoSnapIoStreamX Component Define a global instance of the component and create it in a function. For example: Public WithEvents gBrain As OptoSnapIoStreamX Sub Main() Set gBrain = New OptoSnapIoStreamX End Sub Open a Connection to the Brain Use the OpenStreaming() method to prepare for listening to stream packets. For example: Dim nResult As Long ' Open for standard streaming nResult = gBrain.OpenStreaming(1, 0, PortNumberEdit.Text) ' Check for error If (nResult SIOMM_OK) Then HandleError (nResult) End If Start Listening to a Brain Use the StartStreamingListening() method to start listening for stream packets from the specified brain. For example: ' Start listening If (nResult = SIOMM_OK) Then nResult = gBrain.StartStreamListening("10.20.30.40", 2000) End If Handle Stream Events Use the OnStreamEvent() event to handle caught stream packets. For example: Private Sub gBrain_OnStreamEvent(ByVal nIpAddress As Long, ByVal nStatus As Long) Dim nResult As Long ' Check the status of the event If (nStatus SIOMM_OK) Then ' A timeout is the most likely error HandleError (nStatus) Else 58 SNAP Ethernet-Based I/O Units Protocols and Programming Guide
CHAPTER 3: USING THE SNAP ETHERNET I/O DRIVER TOOLKIT Dim StreamBlock As SIOMM_StreamStandardBlock ' Get the last stream block nResult = gBrain.GetLastStreamStandardBlockEx(StreamBlock) If (nResult = SIOMM_OK) Then ' If no error, do something with the data Else ' Check the result HandleError (nResult) End If End If End Sub Stop Listening and Clean Up Use the StopStreamListening() and CloseStreaming() methods to clean up. For example: ' Stop listening nResult = gBrain.StopStreamListening("10.20.30.40") ' Close the connection nResult = gBrain.CloseStreaming() Interface Introduction Here are the interfaces for the ActiveX components and C++ classes. Since the interfaces are very similiar and the components may be used from different languages, the information is presented in a general format. Basic Data Types The following data types are used. They may have different names in different languages. byte: 8-bit signed integer short: 16-bit signed integer long: 32-bit signed integer string: string float: 32-bit float by_array: an array of bytes l_array: an array of long integers f_array: an array of floats SNAP Ethernet-Based I/O Units Protocols and Programming Guide 59
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SNAP ETHERNET-BASED I/O UNITS PROTO
Page 3 and 4:
Table of Contents Chapter 1: Introd
Page 5 and 6:
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
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About this Guide CHAPTER 1: INTRODU
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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 and 64: Environment Visual Basic 6 Internet
Page 65 and 66: MemMap Example Code CHAPTER 3: USIN
Page 67: CHAPTER 3: USING THE SNAP ETHERNET
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
Page 115 and 116: Status Area Read—Read Only This i
Page 117 and 118: 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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Page 131 and 132:
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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