8 EXPLANATION OF OPERATION
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If the power supply is shut off for three minutes or longer while the CPU module indicator
shows “CPU CELL” (Battery expired), backup memory content may be lost. Furthermore,
the backup memory may be lost if the CPU module has a lithium battery and is stored
unused for a long time (longer than the preset backup assurance period). When backup
memory is lost, the CPU module may not be able to start as no data is available in the
backup memory.
Indicator indication
Possible error cause
OFF
OS program error or C mode program error
Unknown data
OS program error or C mode program error
CPU DOWN
CPU error that stops CPU operation
ROM IDLE
Error in memory for the OS program
ILG INST
Illegal-instruction exception occurred
INV INT
Invalid interrupt occurred
OS PTY
Parity error in memory for the OS program
SMD INVL
Illegal instruction detected by a ladder program
SMD PTY
Parity error in memory for the ladder program
SMD CERR
Error in the ladder program table
SMD PERR
Ladder program error
By referring to “9 MAINTENANCE” (Pages 108 and 109), clear all memory.
After all memory has been cleared, the CPU module is cleared and saved data can be
transferred to the CPU module.
If no saved data is available, reload the application program and reset the parameters.
Содержание S10mini D
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