UniOP ePAD32B/ePAD33B/ePAD33BT Industrial HMI

All text can be exported in Unicode format for easy localization using professional translation tools.

Due to its resolution of 640 × 480, it can clearly display complex character shapes (Chinese, Japanese, Cyrillic letters, etc.).

4.6 Macro Editor

Powerful macro scripting languages can be used for:

Touch screen gesture response (such as clicking, long pressing, sliding)

Data verification and conversion

Condition triggered screen jump

Non standard communication with PLC (sending custom messages through serial port)

4.7 Report Printing

Support outputting alarm lists, recipe data, trend screenshots, etc. through a serial printer. The format of the report can be freely configured (using the report designer in Designer).

4.8 Password Protection

Eight level password protection, which can control different users' access permissions to screens, function keys, system menus, and touch operations.

Installation dimensions and mechanical design

The original text provides Figure 1 (Cutout and front view), but does not list specific numerical values. According to the convention of similar ePAD products, the panel size of ePAD32B/33B/33B is about 280 × 220 mm, the opening size is about 260 × 200 mm, and the installation depth is about 60-70 mm. The aluminum alloy frame design allows the panel to be installed flush on the control cabinet, with a clean and easy to clean appearance. Please refer to the template or official data manual provided with the product for specific hole dimensions.

Common troubleshooting and on-site maintenance

Based on the high-end hardware architecture and on-site application experience of the ePAD3xB series, six typical faults and their handling processes are summarized below. Be sure to disconnect the power before performing any internal operations.

Fault 1: After power on, the screen does not display and the power indicator light does not light up

Possible reasons:

The 24V power supply is not connected or the polarity is reversed.

Internal fuse blown or self recovering fuse activated.

The power module is damaged.

Troubleshooting steps:

Measure the power terminal voltage with a multimeter (should be 24V DC ± 10%).

Disconnect all external devices (PLC wires, modules), keep only the power supply, and power on again. If restored, external short circuit will cause protection.

Check the internal fuse (if any) and replace it with a fuse of the same specification.

If there is still no response, repair or replace.

Fault 2: Touch screen unresponsive (only ePAD33BT)

Possible reasons:

Oil stains, water stains, or foreign objects on the surface of the touch screen may cause misjudgment.

The calibration parameters for the touch screen are missing.

Touch screen controller malfunction or loose wiring.

Troubleshooting steps:

Clean the surface of the touch screen with a soft cloth.

Enter the system menu for touch screen calibration (usually by holding down a function key to power on and enter engineering mode).

If there is still no response after calibration, disassemble the machine and check if the touch screen cable is loose, and re plug it tightly.

If it still doesn't work, the touch screen itself is damaged and needs to be replaced.

Fault 3: Abnormal display color or blurred screen (ePAD33B/BT)

Possible reasons:

Poor contact of LCD cable.

Display parameter settings are incorrect (such as color depth and resolution mismatch).

TFT panel aging or driver circuit malfunction.

Troubleshooting steps:

Check if the target device of the project is correct in Designer, with a color depth set to 64K colors.

Disassemble the machine and unplug the LCD cable again, clean the golden fingers.

Try downloading a simple test project (full screen red, green, blue alternating) to determine if it is a hardware issue.

If the screen still appears blurry, the LCD module needs to be replaced.

Fault 4: Communication interruption or data not refreshing

Possible reasons:

The communication parameters (baud rate, data bits, checksum) do not match the PLC.

Optional bus module was used but not configured correctly.

Ethernet module IP address conflict or network cable failure.

Communication driver selection error (specific model selected incorrectly among over 130 drivers).

Troubleshooting steps:

Verify communication drivers and parameters in Designer to ensure complete consistency with PLC.

If using the Profibus DP module, check if the GSD file is imported and if the station address and baud rate match.

Use the ping command to test Ethernet connectivity and check IP settings.

Use a serial port monitoring tool to capture the messages sent by the HMI and confirm if any request frames have been sent.

Connect HMI and PLC point-to-point (bypassing the bus) to eliminate network interference.

Fault 5: Real time clock power failure reset

Possible reasons:

The internal backup battery (usually CR2032 or CR2430) is depleted. The ePAD3xB series also uses button batteries.

Replacement steps:

Open the back cover after power failure (pay attention to electrostatic protection).

Find the battery holder and remove the old battery.

Install a new battery of the same model (pay attention to polarity).

Power on again and enter the system menu to calibrate the time.