23
2-6 Memory Units
There are three types of Memory Units, having three different types of memory.
The three types of memory are EPROM, EEPROM, and RAM.
Memory Model Capacity Maximum
program size
Backup Clock
1
EPROM C200H-MP831 8K words 6,974 words --- NO
EEPROM C200H-ME431 4K words 2,878 words
C200H-ME831 8K words 6,974 words
C200H-ME432 4K words 2,878 words Battery YES
C200H-ME832
2
8K words 6,974 words
RAM C200H-MR431 4K words 2,878 words Battery NO
C200H-MR831 8K words 6,974 words
C200H-MR432 4K words 2,878 words Capacitor
C200H-MR832 8K words 6,974 words
C200H-MR433 4K words 2,878 words Battery YES
C200H-MR833 8K words 6,974 words
Note 1. With the C200H-CPU21-E and C200H-CPU23-E CPU Units, a Memory Unit
with the clock must be installed to use the clock/calendar and error history
functions.
2. The C200H-ME832 Memory Unit cannot be used with the C200H-
CPU01-E/03-E/11-E CPU Units.
3. The C200H-CPU31-E CPU Unit has a built-in clock.
Fixed DM area
(DM 1000 to DM 1999)
I/O table (see note)
UM (ladder program area)
Contents for Memory Unit Registration
Note I/O tables are also saved in the Memory Unit at the time of creation. Therefore, if
the Memory Unit is set to write-protect, it will be impossible to create an I/O table.
EPROM Unit The data that you wish to store in an EPROM Unit must first be written to an
EPROM Chip, using the PROM Writer. Then the EPROM Chip must be mounted
to the inside of the EPROM Unit.
EEPROM Unit Data can be stored in the EEPROM Unit while the Unit is mounted to the PC. The
data is retained indefinitely when the power is turned OFF.
Memory Units Section 2-6
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