USB Serial Converter Rev. 1.0

Transcription

1 USB Serial Converter Rev. 1.0

2 Contents 1.Introduction Overview Package Contents System Requirements and Restrictions DB9(RS-232C) connector Pin Assignment Installation on Windows PC Installation on Windows 10/8.1/8/7/Vista Server2012 R2/Server2012/Server2008 R2/Server Confirmation Uninstallation on Windows 10/8.1/8/7/Vista Server2012 R2/Server2012/Server2008 R2/Server Application note Setting USB transfer size and latency time Flow control Specifications *All trademarks and logos are the properties of their respective holders. *The specifications and pictures are subject to change without notice.

3 1.Introduction 1-1. Overview USB60FPW is a USB to serial converter with 5V power supply. Compatible with Universal Serial Bus specifications Rev Up to 230.4Kbps data transfer rate. Standard USB (A type Male). Easy to connect PC. Virtual COM port driver USB60FPW can be used with PWR(from USB port) FTDI s VCP drivers to provide a COM port on a PC. LED indicators. USB60FPW has PWR/TXD/RXD LED indicators for monitoring TXD(Host to device) communication status. PWR: power / TXD: transmit / RXD(Device to host) RXD: receive 1-2. Package Contents The following items coms with this package: USB60FPW USB Serial Converter Setup CD-ROM. Installation Guide Warranty Card in Japanese 1-3. System Requirements and Restrictions Host machine Windows PC with free Standard USB A type port Operating System Windows 10, Windows 8.1, Windows 8, Windows7, Windows Vista Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server

4 1-4. DB9(RS-232C) connector Pin Assignment The pin assignment of the connector is below: This DB9pin connector is compatible with ANSI/EIA/TIA-574 specifications D-Sub9pin Male Anchor [#4-40] For using inch screw 9Pin provides 5V to devices As 5V outputs to RS-232C devices, the RS-232C devices must be compatible with this 5V output. Otherwise, the RS-232C may get damaged. Pin# Signal Direction Name DTE DCE. Meaning 1 DCD <--- Data Carrier Detected 2 RXD <--- Received Data 3 TXD ---> Transmitted Data 4 DTR ---> Data Terminal Ready 5 GND - Signal Ground 6 DSR <--- Data Set Ready 7 RTS ---> Request to Send 8 CTS <--- Clear to Send 9 5V OUT ---> Output 5V power supply to devices 2

5 2. Installation on Windows PC Please make sure that the Windows PC meets the following specifications: USB port(standard-usb A) is available Windows version is Vista or later 2-1.Installation on Windows 10/8.1/8/7/Vista/ Server 2012 R2/Server2012/Server 2008 R2/ Server 2008 Before connecting USB60FPW USB serial converter to a USB port, follow the instructions below: 1) Insert the setup CD-ROM for the REX-USB60FPW into your CD-ROM drive. Find the [Setup] folder at the CD that contains the USB60FPW_Setup.exe Double click USB60FPW_Setup.exe. 2) A User Account Control dialog box may appear. Click [Yes] to proceed with the installation. 3

6 3) The InstallShield Wizard for RATOC REX-USB60FPW Installer will start. Click [Next] to proceed with the installation. 4) A RATOC REX-USB60FPW Installer will start. Click [Install] to proceed with the installation. 4

7 5) A Windows Security dialog box will appear. Click [Install] to proceed with the installation. 6) A Windows Security dialog box will appear again. Click [Install] to proceed with the installation. 5

8 7) The installer will automatically be complete. Click [Finish]. The RATOC REX-USB60FPW Installer has finished. Connect the USB60FPW to a USB port available on your PC. The necessary drivers will be found. Installation will start and automatically finish. Proceed to (2-2) Confirmation of setting USB60FPW to confirm the installation has finished successfully. 6

9 2-2. Confirmation To confirm the installation has finished successfully, oen the Device Manager and select View > Devices by Connection. Under the Ports(COM/LPT) category, a string of USB60FPW USB-Serial Converer with an additional COM port will appear. If this string shows without yellow! mark, the installation is made successfully. 7

10 2-3. Uninstallation on Windows 10/8.1/8/7/Vista Server 2012 R2/Server 2012/Server 2008 R2/Server 2008 Open the [Program and Features] at [Control Panel]. Select the [RATOC REX-USB60FPW Installer] and click [Uninstall]. The InstallShield Wizard for RATOC REX-USB60FPW Installer will start. The following dialog will appear. Click [Yes] to proceed with the uninstallation. 8

11 The uninstallation will automatically be complete. Click [Finish] to finish the uninstallation. 9

12 3. Application note 3-1. Setting USB transfer size and latency time As this product will be used at default setting, so you do not need to change the below setting unless special issue comes out. If you right-click at the [USB60FPW USB-Serial Converter (COMx)] in the Device Manager, a pull-down menu will appear. At the pull-down menu, select [Properties]. Then, select the [Port Settings] tab. And then, click the [Advanced ] button. Then, the [Advanced setting for COMx] screen will appear(see the next page). 10

13 At the below screen(advanced setting for COMx), you can find [USB Transfer Sizes] and [Latency Timer]. Here is an explanation for these 2 settings. [USB Transfer Sizes] and [Latency Timer] are used to set parameters on receipt data function of USB60FPW. Once USB60FPW detects the following event, it will transfer received data from RS-232C to host via USB. 1) Transfer buffer of 384 bytes inside of USB60FPW becomes full. 2) Line condition for CTS#/DSR#/DCD#/RI# of RS232C gets changed. 3) Detection of event character in received data from RS-232C. 4) Latency time(default time is 16msec) times out. 11

14 Regarding data transfer less than 384 bytes, latency time set at the [Latency Timer] section happens, while much data over than 384 bytes transfer, transfer will start as soon as transfer buffer of 384 bytes becomes full, and latency time set at the [Latency Timer] section happen only to the last data transfer less than 384 bytes. In the worst case of latency time, the following case is considered; At an interval of latency time set at the [Latency Timer] section, 384 bytes data transfer. At the same time when latency time times out, USB60FPW transfer data of 384 bytes. USB receives transfer data of 384 bytes at an interval of latency time, and when data size reaches receipt buffer size requested, it will transfer data to USB serial conversion device drivers. Estimated transfer time of 4K bytes will be approx.(4096/384) x 0.016=0.17 sec. Receipt buffer: 384 bytes Host PC USB RS-232C Data Transfer (Caution) Packet data transferred by USB contains a particular information of 2 bytes. If package data size is 64 bytes, an actual data size received from RS-232C is 62 bytes. The particular information of 2 bytes will be removed automatically inside of USB serial conversion device drivers. USB serial conversion device drivers request USB Transfer Sizes of 4K bytes at default setting. When data is transferred from RS-232C to a PC, the USB drivers transfer data to USB serial conversion device drivers when USB drivers detect the following event: 1) Finish receiving requested data bytes(4k bytes). 2) USB host drivers receive short packets under 64 bytes. 12

15 3) Request is cancelled If USB packets of 64 bytes are continuously transferred to host, USB will keep receiving data until it reaches up to requested USB transfer data size(default is 4K bytes). Once it reaches to requested USB transfer data size, data which is complete with transfer will be transferred to USB serial conversion device drivers, and then, at this point of time, communication application is ready for receiving receipt data from RS-232C. If transfer data is transferred from RS-232C by a small block less than 64 bytes, or transfer speed is much slower, setting value set at the [Latency Timer] section will affect through-put with data transfer Flow control USB60FPW has the following 4 options of flow control: 1) Without flow control With this mode, data may be lost if data transfer is high speed. 2) RTS/CTS with 2 wire hardware flow control If CTS signal is high, devices will send data. If data can not be transferred, RTS signal will be low. 3) DTR/DSR with 2 wire hardware flow control If DSR signal is high, devices will send data. If data can not be transferred, DTR signal will be low. 4) XON/XOFF software flow control Flow control is made by using a particular character called XON/XOFF. Character data used in XON/XOFF can be changed by application. Due to structure of Windows OS itself, data transfer is not made real time from USB60FPW drivers to applications. For example, while rapidly moving the taskbar of application by the mouse, received data sometimes are lost when data transfer is made from RS-232C with at a speed of 115.2kbps. It is strongly recommended that hardware flow control or software flow control is enabled. 13

16 4. Specifications Product Name USB60FPW Serial Input/Output level RS-232C level USB Specification USB(Universal Serial Bus) Specifications Rev. 1.1 Connector USB :Standard-USB Type A male RS-232C:D-Sub9 male (with anchor [#4-40]) Number of I/O ports 1 port Unit Dimensions 3.35[L] x 1.1[W] x 0.43[H] in (85[L] x 28[W] x 11[H] mm) Cable Length Approx ft (85 cm) Weight oz (55 g) Data transfer mode Asynchronous (Start stop synchronization) Data transfer Rate (Baud) 300/600/1,200/2,400/4,800/9,600/19,200/38,400 57,600/115,200/230,400 bps Transmit Distance Within 50ft (15m) Power Voltage DC+5V (Powered from USB Bus) Power Consumption Average: 36mA(5V) Max.: 60mA(5V) Output Voltage 5V output from D-Sub 9pin Serial Parameter Data bit: 7/8 Start bit:1 Stop bit: 1/2 Parity bit: even/odd/none RS-232C connector D-SUB 9PIN RS-232C connector Male ANSI/EIA/TIA-574 LED Indicators PWR:Power LED If the power from USB bus is properly supplied with 5V, this indicator LED will be on. TXD:Transmit data indicator (Host to Device) RXD:Receive data indicator (Device to Host) Operating Environment Temperature: 32ºF to 122ºF (0ºC to 50ºC) Humidity: 10 to 90% (non condensing) Storage Environment Temperature: -4ºF to 149ºF (-20ºC to 65ºC) Humidity: 10 to 90% (non condensing) Note: 1. Do not remove while the application is communicating. System will be unstable. 2. Do not operate to suspend while the application is communicating. System will be unable to resume properly. 3. This product does not support the serial mouse for connecting to RS-232C port. 14

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