RS485 Serial Information > 자유게시판

For each field, its name, value, starting address and size are displayed. The visualizer has two windows, one of which displays data sent to the Serial device, and another one displays data received from the Serial device.All subsequent packets are concatenated into a single data stream, which is displayed as sequence of hexadecimal, decimal, octal, binary data and text. Confirm serial port parameters such as baud rate, data bits, and stop bits: Baud rate should be configured according to the connected RS485 device, commonly used rates are 9600 and 115200; Refer to the device manual or contact RS485 device technical support for configuration, especially if set to Modbus mode, confirm if the function code matches. Currently RS485 drivers are produced that can achieve a bit rate of 35 mbps. The diagram below shows potentials of the A (blue) and B (red) pins of an RS-485 line during transmission of one byte (0xD3, least significant bit first) of data using an asynchronous start-stop method. First part displays each monitored packet parsed according to specified set of protocols. With outstanding performance at the first place, the Request View visualizer is your best tool to analyze monitored data.

Structure View data visualizer is a two-part window. The Request View visualizer displays each monitored packet. For example, you may select a MODBUS protocol packet to see it decoded in Request View and MODBUS View visualizers. Alternatively, the stream may be displayed as a sequence of floating-point numbers with single or double precision.The data visualizer is extremely flexible and allows you to customize both its layout and appearance. Once you select the packet in the upper pane, all its internal fields are decoded and displayed in the visualizers in the lower pane. It is structurally divided into two panes.The upper pane displays brief information for each monitored packet in a table. Depending of the information in the sent data, zero or more nodes on the line respond to the master. A Modbus RS485 connects a Master device to one or more Slave devices. It’s important to note that all devices on the network need to use the same logic for interpreting voltage differences as bits (i.e., whether A being at a higher voltage than B represents a ‘1’ or a ‘0’).In a network with multiple devices, each device needs to have a unique address so that it knows when to listen and when to ignore the communications on the line.

Combined with built-in advanced scripting, it delivers even more power and becomes the versatile serial port communications debugging tool. The built-in protocol definition for parsing BACnet, a data communications protocol for Building Automation and Control Networks. This is comparable with the way ethernet networks function. All data visualizers allow a given data pattern to be easily found using the search function. The search may be performed among the whole visualizer contents or among the selected area only.Some visualizers also provide advanced searching capabilities, including searching for text in different encodings or binary data and a search with regular expressions. It displays data that comes from one end of the virtual link in the top pane and data that comes from another end in the bottom pane.The contents of each pane can be copied into the Clipboard or exported into the file in various formats.Its unique data filtering capabilities make this visualizer a very handy serial bridge protocol analysis tool. It displays incoming data in one pane and outgoing data in another one.The contents of each pane can be copied into the Clipboard or exported into the file in various formats.Its unique data filtering capabilities make this visualizer a very handy serial protocol analysis tool.

In Complete mode the entire packet is decoded and all accompanying data is provided in Hex/ASCII view.The contents of the visualizer can be copied into the Clipboard or exported into the file in various formats. Second part displays raw packet contents. Each packet is matched against one or more of loaded protocol definition files and all protocol fields are shown in the top part of the visualizer. The board with dual RJ11 jacks is the more popular since is can use commercial straight-through, non-reversing, 6-wire data cables with RJ11 connectors. It is faster and much more versatile than the older RS232. But some of the other interfaces are certainly interesting because they can be used in situations where RS232 is not appropriate. You probably have heard of RS232 which is a serial communication method between computers and devices , but have you heard of the RS485 communication? Manufacturing facilities use serial communication to link their devices together.

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