Modscan32软件

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Modscan32软件是一款专门为Modbus通讯协议开发的测试工具，它主要用于工业自动化领域中对Modbus设备的通讯进行检测和诊断。Modbus是一种应用层的协议，广泛应用于自动化设备和仪表之间的通讯。它具有结构简单、透明度高、稳定性强的特点，因此在工业自动化领域中得到了广泛应用。Modscan32软件的功能十分强大，它能够支持Modbus RTU和Modbus TCP两种通讯模式，能够连接各种类型的Modbus设备，包括智能仪表、PLC、DCS等。它还能够模拟Modbus主站和从站，进行读写操作，测试设备的通讯功能和性能。此外，Modscan32软件还提供了一些高级功能，例如数据分析、日志记录、自动化测试等。这些功能可以帮助工程师快速定位问题，提高工作效率。Modscan32软件的操作界面简洁友好，用户可以直观地看到通讯的数据，方便理解和操作。Modscan32软件是一款功能全面、操作简便、性能稳定的Modbus通讯测试工具，对于从事工业自动化设备维护和调试的工程师来说，是一款不可或缺的工具。

1. ModScan Overview 1.1 Document/View Architecture 1.2 Modbus Data Definition 1.3 Display Formats 1.4 Connecting to a Modbus Network 1.4.1 Direct Serial Connections 1.4.2 Modem Connections 1.4.3 Network Connections2. Menu Commands 2.1 File menu 2.2 Connection menu 2.3 Setup menu 2.4 View menu 2.5 Window menu 2.6 Help menu3. Tool & Status Bars 3.1 Toolbar 3.2 Format Selections 3.3 Status Bar4. Testing Features 4.1 Writing Data to the Modbus 4.2 Message Counters 4.3 Observing Serial Traffic 4.4 Capturing Data to Text File 4.5 User Defined Commands 4.6 Scripts5. Using ModScan with a Database6. Using OLE Automation 6.1 Overview 6.2 Automation Routines7. Distribution/Registration 7.1 Pricing 7.2 Licensing 7.3 Support 7.4 Other Products1. ModScan OverviewThe ModScan application operates as a MODBUS mastermodbus_protocol devicein either RTU or ASCII transmission modes. ModScan may be used to accessand modify data points contained in one or more MODBUS slave devicesconnected to the PC via a serial port, modem, or network. ModScan supportsthe standard MODBUS message types 01-06, 15 & 16, as well as providingthe ability for you to exercise special features of a slave device bytransmitting custom command strings and observing the response. ModScanis a useful test and diagnostic tool for verifying the proper slaveresponse to MODBUS queries as well as being a low cost data collectiontool for interfacing data into PC database and spreadsheet applications.1.1 Document/View ArchitectureModScan utilizes the standard Windows Multiple-Document-Interface, (MDI),architecture for displaying modbus data to the user. Each documentrepresents a series, (array), of modbus data points identified by the following parameters:Slave Device Address Represents the physical device attached to the modbus networkData Type Internal data representation, (i.e. input, coil, register)Data Address Point address within the deviceLength Number of points to scan/displayAssociated with each document is also a timer, which is used toperiodically scan new data from the defined slave and refresh thedisplay. The modbus data definition is accessible from the ModScanmenu or via edit controls in the top splitter window of the documentdisplay. As new data is obtained from the slave device, it is written to the bottom splitter window in one of several formats,depending upon your preference. The size of each document displaywindow is adjustable via the splitter control.1.2 Modbus Data DefinitionThe upper half of each Document's View represents the data selected fordisplay, (and possible capture to a historical data file). In mosttesting applications, the ModScan will only be connected to a singlemodbus slave device, however, in a multidrop modbus network, there maybe several devices accessible from a single connection. The "Device Id"edit control allows you to specify the slave address for the source ofthe data. Likewise, edit controls are available to select the pointtype, data address, and number of data points to access.Notice that the modbus protocol uses a 5-digit representation for theslave data address which infers the point-type. For example, INPUT STATUS values are always represented in the range 10001-19999:HOLDING REGISTERS are displayed as 40000-49999. The ModScan applicationuses the standard notation for displaying data in the bottom splitterwindow, however the address specified in the upper splitter address edit control assumes a 4-digit physical point address. This address, coupledwith the point-type specifier completely defines the data to be accessedin the slave device.The upper splitter window also contains two counters which are used totally the number of data requests made from this document to the modbusconnection and the number of valid slave responses received in reply.A button is available within the display which resets the countersassociated with this document. 1.3 Display FormatsAs data is received from the slave device, it is displayed to the lowersplitter view of the associated document. Any errors incurred duringthe exchange of information will be displayed on the first line. Thefont and colors used to display the data is configurable via the View,Config menu options.Modbus register data may be displayed in any of the following formats:Binary Data displayed as 16 discrete values.Decimal Ranges from -32767 to 32768Hexadecimal 0000-ffffFloating Point IEEE Standard Floating Point Notation (Requires two registers per value)Word-Swapped Floating Point Inverted Floating Point used by some processorsDouble-Precision Floating Point 64-bit Floating Point NotationWord Swapped Dbl Precision Inverted 64-bit Float Values1.4 Connecting to a Modbus Network1.4.1 Direct Serial ConnectionsModScan may be used to obtain data from modbus slave device connectedto the PC in one of three basic physical arrangements. The most commonconnection is via any one of the four available PC serial COM ports.ModScan uses the standard Win32 software drivers for communication withthe COM ports, thereby providing support for any hardware serial boardswhich may be installed in the Windows operating system, (including RS-232,RS-485, etc.). You have complete control over the operating characteristicsof the serial connection by selecting the appropriate baud rate, parity,and control line, (handshaking), properties to match the slave device(s).1.4.2 Modem ConnectionsIn remote testing situations, the ModScan application may be used tocommunicate with a modbus network over a dedicated modem connection.ModScan supports the TAPI, (telephony application interface), standard implemented in Windows and Windows NT. If selected, the modem connectiondialog allows you to enter a phone number for dialing. Any TAPI deviceconfigured within the Windows operating system is available for use.It is also possible to connect via modem to a remote system utilizingthe built-in networking characteristics of Windows '95 & NT. To do this,you will need to configure the ModScan application to connect via a TCP/IP connection which has been setup within Windows to automatically dial andestablish a PPP connection with another Windows machine which is connecteddirectly to the slave device(s) you wish to use. In this case, ModScanoperates as if it were using a network card connected directly to amodbus to tcp/ip bridge device.1.4.3 Network ConnectionsModScan allows modbus communications to occur over a TCP/IP network.This feature requires the use of a modbus to TCP/IP bridge device whichcan service network requests from the network and obtain the data froma connected slave device prior to responding to queries from the ModScanapplication. A bridge device operates as a network server, providingsupport to numerous client applications distributed over the network. WinTECH Software provides such a server for interfacing to a singleserial modbus network. Third-party vendors may provide various solutionsfor interfacing TCP/IP to modbus devices via other hardware, (i.e. modbusplus, etc.). If the interfacing specification for these network bridgedevices is available in the public domain, they may be included in futurereleases of the ModScan application. If you have the need to use ModScanwith a third-party vendor's equipment, please contact the WinTECH Softwaresupport line for consideration.2. Menu Commands2.1 File menuThe File Menu offers the following commands:New Creates a new ModScan document. Each document represents a different block of data from a modbus device.Open Opens an existing document. Close Closes an open document.Save