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Connection Troubleshooting

This guide explains how to troubleshoot connection issues with controllers and video capture devices.

Controller Not Responding​

Symptom: Controller status shows gray "Disconnected", or the connection test fails.

Troubleshooting Steps​

  1. Check physical connections

    • Verify the RS-232/RS-485 cable is properly connected between the controller and computer.
    • Ensure the cable is not loose or damaged.
    • If using a USB-to-RS-232/RS-485 adapter, verify the adapter is working.

  2. Verify COM Port

    • Open Windows "Device Manager > Ports (COM & LPT)".
    • Confirm the COM port being used appears in the list.
    • Select the correct COM port in Device Configuration.

  3. Verify communication parameters

    • Ensure the following parameters match the controller settings:
    ParameterTAIE FC Series Default
    Baud Rate9600
    Data Bits8
    ParityOdd
    Stop Bits1

  4. Verify Slave Address

    • Temperature controller default Slave Address is 1.
    • Pressure controller default Slave Address is 2.
    • Confirm the address setting on the controller matches the software.

  5. Check controller power

    • Verify the controller is powered on and operating normally.
    • Check whether the controller display panel shows normal readings.

Intermittent Communication​

Symptom: Controller readings work sometimes but fail at other times, or values jump erratically.

Troubleshooting Steps​

  1. Baud Rate mismatch

    • Verify the Baud Rate is set identically on both the software and controller sides.

  2. Cable quality

    • Replace with a higher-quality cable.
    • Shorten the cable length (RS-232 recommended max 15 meters).
    • For RS-485 buses, install termination resistors at both ends.

  3. Electromagnetic interference

    • Route communication cables away from high-power equipment or motors.
    • Use shielded cables.

  4. Poll interval too short

    • In Device Configuration, increase the Poll Interval from 500 ms to 1000 ms.

Video Device Not Detected​

Symptom: The device list in Device Configuration is empty, or the capture card cannot be found.

Troubleshooting Steps​

  1. Check USB connection

    • Ensure the capture card's USB cable is securely connected.
    • Try a different USB port (USB 3.0 recommended).

  2. Check drivers

    • Open Windows "Device Manager" and verify the capture device has no yellow exclamation mark.
    • If there is an exclamation mark, reinstall the driver.

  3. Device in use by another application

    • Ensure no other software is currently using the capture device.
    • Close any programs that may be occupying the device and try again.

  4. Re-detect devices

    • In "Device Configuration > Video", click "Refresh" to rescan for devices.

Checking Connection Status in the Application​

Controller Connection Status​

  • Open "Device Configuration" and click the "Test Connection" button for each controller.
  • Green "Connection OK" indicates a successful connection.
  • Red "Port not found" indicates the COM port does not exist.

Status in Process Monitor​

  • In the Process Monitor window, each controller has a connection status indicator:
    • Green: Connected
    • Gray: Not connected
    • Red: Connection error

Simulation Mode​

If you cannot connect to physical controllers temporarily, you can enable simulation mode:

  1. Open "Device Configuration > General".
  2. Enable "Simulation Mode".
  3. The system will generate simulated temperature and pressure data, allowing you to test other features.