Standard Rom Life; Built-In Ssd Life - Mitsubishi Electric MELSEC Q Series User Manual

9.4

Standard ROM Life

Described in this section is the standard ROM lifetime.
Do not write files other than parameter and script files to the standard ROM.
If you need to do so, write files into an SD memory card or CompactFlash card.
(1) Standard ROM life
• The life of the standard ROM is represented as write count index value and writing is allowed until it reaches
to 100,000.
• As the C Controller module make an effect to extend the writing life of the standard ROM, actual write count
index value will not be the same as actual count of writing.
• Replace the C Controller module when the write count index value has reached to 100,000 times.
(If the write count index value exceeds 100,000, writing to the standard ROM may become slower or result in
an error.)
(2) Standard ROM write count index value check
• The standard ROM write count index value can be obtained by the C Controller module dedicated function
(CCPU_GetCpuStatus) from the user program.
• If the write count index value exceeds 100,000, it is registered to the event history.
• As the standard ROM operations were checked in our shipping inspection, the initial value of the write count index
value is not 0.
• Normally, C Controller module always checks data in the standard ROM area, so the write count index value may
be increased.
9.5

Built-in SSD Life

For the life of built-in SSD and the checking method, refer to the manual of the partner operating system, or consult the
partner (operating system vendor)
CHAPTER 9 MAINTENANCE AND INSPECTION
Q24DHC-LS
Q24DHC-V Q24DHC-VG
Q24DHC-VG
Q24DHC-V Q24DHC-LS
9
Q26DHC-LS
Q12DC-V
Q26DHC-LS Q12DC-V
137