Rack Components
Section 2-3
Expansion Data Memory
An Expansion Data Memory Unit may be used only in a CV1000-CPU01-EV1,
CV2000-CPU01-EV1, or CVM1-CPU21-EV2 CPU. The Expansion Data
Memory Unit fits into the slot located on the upper left side of the CPU. The Ex
-
pansion Data Memory Unit is optional. There are three models of Memory Units
available with different memory capacities. The addition of an Expansion Data
Memory Unit increases the data memory capacity of the CV1000, CV2000, or
CVM1-CPU21 from 24K words (D00000 to D24575) to up to 256K words. Refer
to the CV-series PC Operation Manual: Ladder Diagrams for details on PC
memory and addressing conventions.
Model
Memory capacity
64K words
Word assignment
E00000 to E32765 x 2 banks
E00000 to E32765 x 4 banks
E00000 to E32765 x 8 banks
CV1000-DM641
CV1000-DM151
CV1000-DM251
128K words
256K words
When mounted to the CPU, the Expansion Data Memory Unit is backed up by
the battery mounted in the CPU. Provided the Unit has been mounted to the
CPU for a duration of at least 1 minute, a charged capacitor built-in to the
Memory Unit allows the Unit to be removed from the CPU for up to 10 minutes
without memory loss.
Memory element
Pullout
lever
CPU
connector
Backup
capacitor
Expansion Data Memory Unit
30
OMRON [ OMRON ELECTRONICS LLC ]
