BECKHOFF CX51x0 Embedded PC Deployment Guide

Immediately disconnect and check the first terminal and end KL9010 after the 40 power module

Check the (n+1) th terminal for wire breakage after the nth terminal

5. Communication error with the nth terminal register. Replace the nth terminal

6 0 initialization error, replace embedded PC

6 1/8 internal data error hardware reset (power off and restart)

7 0 Process Data Length Mismatch Check for Consistency between Configuration and Actual Terminals

The State variable (under TwinCAT bus coupler) provides more diagnostic bits:

Bit0: K-bus error

Bit1: Terminal configuration change

Bit2: Process image length mismatch

Bit8: No valid input

Bit9/10: Input/output update incomplete

Bit11: Watchdog

Bit15: Asynchronous reset activation

7.3 E-bus mode

Meaning of LED

Us/UP 24V as above

L/A off=E-bus not connected; Always on=Connected with no data; Flashing=Data transmission and reception in progress

E-bus error checked through TwinCAT CoE directory, no dedicated ERR LED.

Maintenance and battery replacement

8.1 Preventive replacement cycle

Suggested replacement interval for components

Motherboard battery (CR2032) 5 years

UPS/battery pack for 5 years

CFast, SSD, microSD 10 years

Fan (if any) for 5 years

8.2 Battery replacement steps

Turn off the embedded PC and disconnect the power.

Open the front flap.

Carefully remove the old battery (CR2032, 3V). Use insulated tools (if not accessible by fingers).

Push in the new battery with the negative pole facing left (pointing towards the DVI-I interface).

Close the cover and reset the date and time in BIOS after powering on again.

8.3 Cleaning

Clean only the outer shell using a soft damp cloth. Do not use compressed air (which may blow dust into the interior). You can use a vacuum cleaner to remove dust from the ventilation holes. Corrosive solvents, abrasives, and metal scrapers are prohibited.

Practical troubleshooting of common faults

Possible causes and solutions for the fault phenomenon

After power on, the PWR LED does not light up. 24 V power supply is missing or the polarity is reversed. Measure the voltage of the Us terminal at 19.2~28.8 V; check the fuse (4 A)

The PWR is on but the TC LED is off. TwinCAT is not running or the configuration is missing scanning I/O devices; Check the connection of the target system; Restart TwinCAT Runtime

K-BUS ERR continuously flashes EMC interference or historical errors not cleared. Check the grounding and power filter; Disconnect Us and then power on to clear the status

Unable to save persistent variables. Write filter not configured with exceptions or registry settings incorrect. Check FBWF exception directory WinCAT Boot; Set ClearInvalidPersistentData=0

Serial port cannot find BIOS mode error in TwinCAT (should be PCI mode) Enter BIOS Advanced>LPSS&SCC Configuration set to PCI mode, OS Selection set to Windows 7

Ethernet cable redundancy does not work, TS622x authorization is not installed, or the second adapter is not configured with installation authorization; Select the second network port correctly in Advanced Settings>Redundancy

System time: Every time the system is shut down, reset the motherboard battery and replace the CR2032 battery when it runs out

After vertical installation, if the CPU temperature is too high and violates the installation direction (vertical is prohibited), it should be installed horizontally and ensure a ventilation distance of 30mm

Passive EtherCAT terminal causes communication interruption. The passive terminal is directly attached to the power module and the active terminal (such as EL1004) is inserted in the middle

Remote Display Cannot Connect (Windows CE) Remote Display is not enabled. Set Remote Display to On through Beckhoff Device Manager>Boot Opt

Retirement and disposal

Software shutdown: Normal shutdown of the operating system and TwinCAT.

Power off: Cut off the 24V power supply and unplug all wiring (first Us/UP, then signal line).

Remove the DIN rail: Use a screwdriver to open the upper and lower locks, pull the orange strap, and lift the module upwards to detach from the rail.

Separate modules: If there are multiple module combinations, separate them according to the above method.

Environmental disposal: Electronic components must comply with local electronic waste regulations (such as WEEE) and must not be mixed with household waste.