Mitsubishi GOT2000 Utility Troubleshooting and System Maintenance Complete Guide

Common problem: Time synchronization or low battery voltage causing clock data loss.

Solution steps:

Install the built-in battery of GOT (GT11-50BAT or GT15-BAT), otherwise the time will not be maintained after power failure.

In [GOT Setup] → [Time], enable "Adjust" or "Broadcast" as needed.

Adjust: GOT retrieves time from PLC or SNTP server. Reference channel number or SNTP server IP needs to be set.

Broadcast: GOT writes its own time to the PLC. Broadcast channels and triggering conditions (rising edge/falling edge/timed sampling) need to be set.

If you need to display the local time zone, set "Local time" and select the time zone (such as GMT+8:00).

System maintenance and self inspection

3.1 Batch Self Check

Batch self-test can collect GOT startup information, system status, communication settings, operation history, screen switching history, clock change history, system alarm history, CPU error history, etc., and can export system status logs to SD card.

Operation: Go to [Maintenance] → [Batch self check], select the export destination drive (A: SD card), and click [Start]. After completion, detailed results can be viewed.

Application scenario: Export logs for Mitsubishi technical support analysis when GOT frequently restarts or encounters anomalies.

3.2 Touch Panel Calibration

Due to long-term use or temperature changes, the touch position may shift.

Calibration steps:

[Maintenance] → [Touch panel calibration].

Touch the center of the four "+" symbols (top left, top right, bottom left, bottom right) displayed on the screen in order.

Automatically return after calibration is completed.

Troubleshooting: If the calibration is still inaccurate, the calibration can be repeated. If a 'Touch panel calibration error' occurs, the touch panel may have a hardware malfunction and needs to be replaced.

3.3 System Alarm Viewing and Clearing

System Alarm displays error messages such as GOT, controller, network, etc.

Viewing method:

View the current alarm list in [Maintenance] → [System alarm].

The error code format is "G01-402" (G is GOT error, 01 is classification, 402 is specific error).

Controller errors (such as PLC) will display "M0128-1000" and so on.

Clearing method:

GOT self error: After eliminating the cause, click the [Reset] button on the system alarm screen.

CPU error or network error: Automatically reset after eliminating the cause.

If it cannot be cleared, restart GOT.

3.4 Touch Panel Check

Used to detect whether there is a dead zone in the touch area.

Operation:

[Maintenance] → [Touch panel check], the screen turns completely black.

Touch various areas of the screen with your fingers, and the touched points will turn yellow (or white/gray depending on the model).

If there is no color change after touching a certain area, the touch screen may be damaged.

3.5 I/O check and Ethernet check

I/O check: Used to test RS-232 interface hardware. Self loop connectors (short circuits 2-3, 4-6, 7-8) need to be made, and then Self loop back testing should be performed.

Ethernet status check: Enter the destination IP address and click [Ping transmission] to test network connectivity.

Data Management and Backup

4.1 Alarm Log Management (Alarm Information)

The alarm log is stored in G2A format on an SD card, USB, or network drive.

Common operations:

Convert format: Select G2A file, click [G2A → CSV] or [G2A → TXT], and export as a readable file.

Delete/Copy: Select the file and click [Del] or [Copy].

Troubleshooting: If the alarm log cannot be read, it may be due to a format mismatch caused by a change in project data (error code 525). At this point, old logs need to be deleted or recreated.

4.2 Recipe Information Management

The recipe file (G2P) can read and write device values from the controller, and can also be converted to CSV or Unicode text for editing.

Common problem: Recipe writing failed (error code 583/584).

Solution:

Check if the SD card is write protected.

Confirm that the recipe file is not damaged and regenerate it if necessary.

If the SRAM user area space is insufficient, initialize or backup data through [Data Management] → [SRAM Management].

4.3 Backup/Restoration

GOT2000 can backup the sequence program, parameters, file registers, etc. of PLC to SD card, and supports triggering backup (automatic backup according to conditions).

Backup settings:

[Extended function setting] → [Backup/reset] Set the backup destination drive (A: SD card).

The maximum backup data quantity can be set (0-50, 0 is unlimited).

Trigger backup: The trigger type (Rise/Time) and corresponding device or time can be set in [Trigger backup].

Recovery precautions:

The target PLC must be in STOP state before recovery (FX series needs to be manually stopped).

If a backup/recovery password is set, you need to enter the password first.

Common error: Backup data not found (error code 634) - Check if the SD card is inserted or if the drive in the backup settings is correct.

4.4 SD Card Format and Memory Check

SD Card Format: In [Data Management] → [Memory Card Format], enter the password "1111" and format the SD card. Note: GOT cannot format an unformatted SD card, it needs to be formatted as FAT16/FAT32 on a PC first.