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CPU Units Section 3-1
3-1-2 Battery Compartment Cover
To open the battery compartment cover, insert your fingertip or a small screw-
driver in the gap at the bottom of the cover and open upwards.
3-1-3 Battery
The CPU Unit has an internal battery. The following data is backed up using
the battery.
• I/O memory (including PC Setup)
• User program
• Clock data (when a Memory Cassette with a clock is mounted)
The battery life at an ambient temperature of 25°C is 5 years. When the bat-
tery expires, the ERR/ALM indicator on the front of the CPU Unit will light.
Replace with a new battery within one week.
Replacement Battery Set
Battery Compartment Cover
DIP switch
Battery
Memory Cassette mounting slot
(inside the compartment.)
Model number: CPM2A-BAT01
CPU Unit
User
program
I/O memory
Time data
Backup
Battery
Memory Cassette
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