Omron CQM1 Operation Manual page 23

CPU Unit
EEPROM Write Protection
Caution
!
EPROM Version
12
2. Slide the Memory Cassette into the CPU Unit on the tracks provided. Press
the Memory Cassette in so that the connectors fit securely.
3. Replace the bracket as shown below and tighten the screw.
Turn on the write-protect switch on the EEPROM Memory Cassette to prevent
the program or PC Setup from being deleted accidentally. Turn the switch off
when writing to the Memory Cassette.
Always turn off the CQM1 and remove the Memory Cassette when changing the
write-protect switch setting.
Note Flag AR 1302 will be ON when the write-protect switch is ON.
The four EPROM chips listed below can be used in the Memory Cassettes.
EPROM Version
27128
27256
27512
Memory cassette
Mounting bracket
Read/write
Capacity Access Speed
8K words 150 ns
16K words 150 ns
32K words 150 ns
Section 2-1
Read-only
(write-
protected)
Model Number
ROM-ID-B
ROM-JD-B
ROM-KD-B