2-WIRE RS-485 TESTING
USING LOOPBACK OR WITHOUT LOOPBACK
PAGE 8 OF 9
B&B Electronics ComTest – A Serial Test Program For Port & Converter Testing With Windows
- A Test Program for Simple Checks of Serial Ports, Serial Converters, Serial DAQ Devices.
Works with USB Serial Converters & ISA or PCI Serial Cards
- Serial Port Access under Windows 95/98 and NT 4.0 – Com1-Com8 or above.
- Dual Windows show typed transmit characters in separate window from received characters.
- Transmit & Receive Activity Indicators
- Unprintable Characters Shown in Hex – 2 Digits Within Left & Right Angle Brackets.
- Visual Indication of Handshaking Lines – DTR DSR DCD and RTS CTS. (Red = Hi)
- Option for Setting DTR or RTS lines high or low for port powered devices or RTS Control.
- Option for Repeat Mode – last character or Function Character Sequence is repeated until
set off.
- Option for Defining Strings to Output Using F1-F12 Keypress – Useful for DAQ Checkout
- Option for Sending Unprintable Characters – Alt + 3 digit keycode, then release Alt.
- Configuration Settings:
- Baud Rates 150, 300, 600, 1200, 2400, 9600, 19.2, 28.4, 57.6, 115.2K (9600 default)
- Parity: None, Odd, Even, Mark, Space (None is default)
- Data Bits: 5, 6, 7, 8 (8 default)
- Stop Bits: 1, 1.5, 2 (1 default)
Start ComTest
1. Connect the device to check to the serial port, or if performing a loopback test, make
connections.
2. Select Start, Programs, B&B Electronics, ComTest.
3. (If you get Win Port window showing shared modems, click Cancel)
4. ComTest Starts with a Select Port Window.
5. Select the Com port to access or test. (The drop down box shows available ports not in use).
6. Click Ok. Configure Port is shown.
7. Select the needed baud rate, parity, data bits, stop bits. (Defaults are common settings).
8. Type characters – they will appear in the upper window.
9. If performing a loopback test, observe the received characters in the lower window.
10. If sending commands to a serial DAQ device or Smart Switch, enter the control strings and
observe the device response or characters returned in the lower window.
(123 Seiten)
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