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7 APPLICATION INSTRUCTIONS
7.21 Database Access Instructions
*1 Use 16 or less fields/tables for a programmable controller CPU with firmware version earlier than "28".
2025H The database cannot be recognized. Or recovery of the database
failed.
• Check the status of the SD memory card.
• If the error database check file (2:\CPUDB\ErrorDB.txt) exists and it
lists a database which resides under the CPUDB folder or its
subfolder, delete the database with its folder and then create a new
database.
• If the problem persists after powering off and on the CPU module or
reset it, or the error database check file (2:\CPUDB\ErrorDB.txt)
exists and it lists a database which resides under other than the
CPUDB folder or its subfolder, delete the dbmaintainpath.txt file on
the $MELPRJ$\$DBASYS$ folder in the SD memory card, delete all
database folders (excluding the CPUDB folder), and then create a
new database using the DBIMPORT(P) instruction.
Others • The character code of the Unicode text file is incorrect.
• The database to be accessed is in an invalid status.
• Check the character code of the Unicode text file.
• If the same error occurs even after powering off and on or reset the
CPU module, delete the access-target database folder, and create a
new database by using the DBIMPORT(P) instruction.
Error
code
Error content Action
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