Loopback serial cable manual#
Loopback serial cable Pc#

Please refer to the corresponding Hardware Manual for your display unit for supported COM ports. Write_Status = GetCommState(comm, &dcbSerialParams) //retreives the current settingsĭcbSerialParams.BaudRate = CBR_57600 // Setting BaudRate = 9600ĭcbSerialParams.ByteSize = 8 // Setting ByteSize = 8ĭcbSerialParams.StopBits = ONESTOPBIT // Setting StopBits = 1ĭcbSerialParams. To check COM1 or COM2, you need to connect a loopback cable. Timeouts.WriteTotalTimeoutMultiplier = 1 ĭcbSerialParams.DCBlength = sizeof(dcbSerialParams) Printf('opening serial port successful') GENERIC_READ | GENERIC_WRITE, //Read/Write This is how I have created the code: #include

I appears that the buffer size is not correct, or the data is not being retrieved from the Serial. I'm having some problems when receiving the data. Use a working part if moving on to test the next part of the setup.Īnd as always if you need further help please send us an email to a detailed explanation and we will help you as quickly as possible.I'm trying to create a simple Serial communication in C. If the part is not responding, then there is something wrong with the wiring or the part is damaged. If the letter(s) appear then the part being tested is doing its job (there could still be other issues with the part). Picture 1 showing how this will look on your screen: Now type the letter A as a command and press send, this letter/signal should be rerouted back.Īny letter written SHOULD be shown on the screen when sent.Open the terminal emulator “Communication - Terminal Emulator”.Choose the correct com port via “Communication - Serial port”.Just keep stacking gender changers, 25s to 9s, 9s to 25s, and null modems until something works. You have to get into the 90s approach to such problems. Open the Nortek program normally used to connect to the instrument (AquaPro, Aquadopp, AWAC or Vector). Pinout of USB-RS232 cable, I assume is the same pinout as the one found on computer motherboards.

Loopback serial cable Pc#

Connect the converter to the PC using the USB.

Loop the send and receive pin (Tx = transmit, Rx = receive) What wires are shorted on a serial cable for loopback testing Environment.

This can be a very helpful tool when troubleshooting. It basically loops back the sent signal as the received signal. The signal the PC sends out is then sent back to the PC and is shown in the terminal emulator. The PC will send a signal via the “receive” pin (from instruments point of view) that is looped back to the send pin by connecting the send and receive pins. Working your way from the converter to the electronics card will test all parts of the setup, one by one. Dacimora RJ45 Coupler Ethernet Extension Connector,Ethernet Cable Extender Adapter,Cat7 Cat6 Cat5e Cat5 Ethernet Coupler(3Pack, Black) 4.8 out of 5 stars 45.

24-pin Molex connected to the electronics cardĪ loopback test can be performed at every step within the setup to track down a potential error in the communication lines. T1/E1/PRI Loopback Plug and Jack RJ45 Testers Carrier or Equipmet Loop Back.

9-pin Molex connected to the connector on the inside of the end-bell.

There is more than one way to wire up a loopback plug - but this is. Two options to plug into your PC port - DB25 male and DB9 female. The loopback plug connects serial inputs to serial outputs so that the port may be tested.

8-pin end-bell connector at the wet end of the cable These slimline loopback testers can help diagnose problems with serial or parallel interfaces.

9-pin D-sub (connects to the converter).

Opening the instrument and accessing the electronics or performing repairs requires technical understanding, please follow the manual and if you are unsure about anything have a technician perform the work or contact Nortek support.Ī standard Nortek midlife instrument communication setup consists of these parts you can perform a loopback test on: Please consult the troubleshooting section (chapter 5) in the comprehensive manual before starting to troubleshoot your instrument.