We are using a USB to RS232 adapter because the computer we are using does not have a serial port. In this example we will be looping back our USB-232-2 USB to RS232 adapter by connecting TX to RX(pin 2 to pin 3) on the DB9 connector. RS485 is half duplex and cannot be single converter loop back tested. Our fiber optic converters can be looped back by connecting fiber in to fiber out. In addition, our RS232 to TTL converters can be looped back by connecting TX to RX. By using our RS232 to RS422 converter, a loopback test on RS422 can be performed by connecting TX+ to RX+ and TX- to RX. A loopback test can only be performed on other full duplex (simultaneous bidirectional serial devices) protocols. A loopback test can be performed on aserial RS232 port or device by connecting TX and RX (pins 2 and 3) together. SEE FIGURE 5.19Ħ.1 APPLICATION 1 â€"SINGLE SERIAL PORT LOOPBACKĪ single port or device loopback test is a very useful way of determining whether a serial port, attached device, or converter is functioning properly. The “Advanced†can automatically open a port as soon as the application starts, or notify of any available updates. To enable “AutoSend†check the Enable AutoSend box. The “AutoSend†allows the output data to be continuously transmitted with a delay in ms at the end of each transmit specified by the Cycle value. The “Received Display†selects either Char Format (ASCII Character) or Hex Format (Hexadecimal Number) for the input data display that will be received. The “Send Display†selects either Char Format (ASCII Character) or Hex Format (Hexadecimal Number) for the output data that will be sent. The “Serial Port Settings†allow the COM Port, Baud Rate, Parity Bit, Data Bit, and Stop Bit to be configured. Custom baud rates can be also entered by checking the “Enable†option and typing the custom baud rate. Standard baud rates are available from the dropdown menu in the Serial Port Settings section. The supported baud rates range from 110 baud to 256,000 baud. The baud rate is the speed in which the data is be transmitted. The “Custom Baud Rate†selects the baud rate data is being transmitted and received. The General settings are divided into six sections: “Custom Baud Rateâ€, “Serial Port Settingsâ€, “Send Displayâ€, “Receive Displayâ€, “AutoSendâ€, and “Advancedâ€. Selecting the presented required settings and selecting “OK†opens the COM port. In order to operate AccessPort the COM port being used must be configured and opened. The “General†configuration menu option contains the main serial port settings and configuration. The default view is the “General†configuration menu option. There is a collection of six menu screens: “Generalâ€, “Event Controlâ€, “Flow Controlâ€, Timeout Control†and “Monitor Controlâ€. The software supports Microsoft Windows 98, 2000, XP, Vista, Server 2003, 2008, 2013, Windows 7 32 bit and 64 bit and Windows 8 32 bit and 64 bit.Ĭonfigures the COM port and serial settings. Since it’s so easy to use witha “simple†user interface, this tool isa favorite amongst serial port novices. It is used as a development aid and debugging tool for RS232 / serial port related projects. It is used by technicians, engineers, software developers, as well asnovices for designing or debugging serial port-related projects.ĪccessPort is a thoroughly tested, mature, and highly-stable product used worldwide by professional engineers, technicians and software developers. Although AccessPort is an advanced serial port terminal / monitoring tool with robust functionality while easy to use due to its simplistic user interface. It has a simple user interface that can be used to control, monitor, test, and debug RS232/RS485/RS422/TTL/Ethernet/Fiber Optic data utilizing our serial products for serial data conversion. AccessPortTM Advanced Serial Port Debugger Freeware is an optional robust serial terminal/monitor software. SerialCommTM offers a number of data conversion products primarily RS232 to RS485/RS422/TTL/Ethernet/Fiber Optic converters for your data conversion needs. AccessPort is an advanced serial terminal, monitor, simulation and data analysis tool that can be used to configure and control serial devices as well as log, view, analyze, or automate serial communication.
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