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11.4 When Programmable Controller Has Been Stored Without Battery
11
MAINTENANCE AND INSPECTION
POINT
1. Before storing the programmable controller, always back up the contents of
each memory.
2. For the CPU module, when the programmable controller power supply is ON or
the CPU module
reset is canceled, format the following data if error is detected while checking.
• Program memory data
• Standard RAM data
• Error history
• Latch data (latch relay (L), devices in latch setting range set in the
parameter, special relay SM900 to SM999, special register SD900 to
SD900)
• Sampling trace data