ADLINK MXE-200 Fanless Embedded Industrial Control Computer Deployment Guide

4.1 Watchdog Timer (WDT)

Working principle: After starting the timer, the application must periodically "feed the dog" (reset the counter). If the timer expires and the dog is not fed, the system will automatically reset the hardware.

API call process (C/C++):

InitWDT() - Initialize WDT hardware.

SetWDT (tick, unit) - Set timeout value, tick=1~255, unit=0 (seconds) or 1 (minutes). For example, SetWDT (10, 0) is a 10 second timeout.

StartWDT() - Start timer.

Regularly call ResetWDT() in the main loop or high priority thread to feed the dog.

If you need to stop, call StopWDT().

Typical application: Start WDT after program initialization and feed the dog at the end of each business cycle. If the business freezes, the system will reset after tick * unit to achieve self-healing.

4.2 Isolation DI/O (optional)

MXE-200 can be optionally equipped with 4-channel isolated DI and 4-channel isolated DO (with 1.5KV isolation), supporting interrupt triggering. The API functions include:

GPIOInitialize - Initialize DI/O resources.

GPI-Read (U16 * pwState) - Read 8 DI states (bit0~bit7).

GPOWrites (U16 wState) - Set 8 DO outputs (bit0~bit7 set to 0/1).

GPO-Read (U16 * pwState) - reads the current DO output state.

Attention: DI/O is an isolated type and requires external power supply (refer to the hardware manual for details). The signal level is 24V logic. When programming, it is important to separate the ground at the isolation end from the internal ground of the system.

Chapter 5: Driver Installation Sequence and Precautions

MXE-200 supports systems such as Windows 7/8/10, and the driver installation sequence strictly follows the manual recommendations:

Chipset Driver ( MXE-200 Chipset Setup. exe) - recognizes SATA, USB, and chipset components.

Graphics card driver ( MXE-200 Graphics Setup. exe) - Intel GMA Driver.

Network card driver ( MXE-200 LAN-Intel autorun. exe) - Install Intel I210IT driver, supporting advanced features.

USB 3.0 driver ( MXE-200 USB3.0 setup. exe).

I/O Drivers ( MXE-200 IO Drivers setup. MSI) - Traditional I/O such as serial ports.

SEMA Utility, WDT, and DI/O Drivers ( MXE-200 WDT-SMA-DIO Setup. exe) - After installation, watchdogs and DI/O APIs can be used in the system.

Important note: Installing all drivers requires administrator privileges. If using Win7, it is necessary to ensure that the system has integrated updates such as KB2862330 before installing the USB 3.0 driver, otherwise there may be a blue screen.

Chapter 6: Key Points for Deploying Industrial Internet of Things (IoT) Gateway

MXE-200i model fully supports Intel ®  IoT gateway solution, integrating Wind River Intelligent Device Platform and McAfee Embedded Control, is suitable for edge computing gateway.

6.1 3G/4G Communication Configuration

Install mini PCIe cellular module and SIM card.

Ensure that the USIM port and mini PCIe slot are enabled in the BIOS.

The operating system requires the installation of the corresponding mobile broadband driver (usually included with the module).

If GPS is required, connect the GPS module to CN19/CN20 for power supply and install the corresponding serial port driver.

6.2 SEMA Cloud Remote Management

ADLINK SEMA Cloud tool enables remote monitoring of system health (temperature, voltage, power consumption), remote power on/off, and event logs. The first use requires registering the device and configuring cloud connection parameters in SEMA Utility.

Chapter 7: Quick Troubleshooting Table for Common Malfunctions

Troubleshooting steps for possible causes of fault phenomena

After powering on, the power indicator light does not light up. If the DC input polarity is reversed or the voltage exceeds the limit, check the V+and V - polarities to ensure 6~36V. Check if the power adapter is working properly

Press the power button and there is no response. The power button wire is not connected (internal) or the BIOS Power Up Mode is Still Off. Check the CN5 cable; Switch to Turn On mode or short-circuit power pin test

After system startup, automatically restart the watchdog and check if Power Up Watchdog is enabled and not fed due to timeout or unstable power supply; Measure input voltage fluctuations

HDMI has no display resolution/refresh rate exceeding the limit or cable issues. Try HDMI to VGA/DVI conversion; Restore default display settings in BIOS

Serial communication failure (COM2): The HSUART mode in BIOS does not match the device. Set COM2 to RS-232/422/485 and restart; Check the DB-9 pin definition (Table 1-6)

MSATA hard drive does not recognize SATA mode error or jumper is not set to mSATA. Check if Slot1 jumper is mSATA; Set SATA Mode to AHCI

3G module has no signal, SIM card is not inserted properly or antenna is not connected. Confirm correct direction of SIM card insertion and check antenna connection

DI/O cannot control the installation of WD_SEMA-DIO driver or the installation of driver by not calling GPIO-INnit; Call GPIOInitialize () in the code first

Ensure a top 5cm clearance when the system temperature is too high, the heat dissipation space is insufficient, or the ambient temperature exceeds the limit; Check if it exceeds the range of 0-50 ° C (standard) or -20~70 ° C (wide temperature)