Omron C200HE Manuel D’Utilisation

be used as the operand in the instruction, and the content of DM 0324 will be
moved to LR 00.

MOV(21)

DM 0100

LR 00

DM 0099

4C59

DM 0100

0324

DM 0101

F35A

DM 0324

5555

DM 0325

2506

DM 0326

D541

5555 moved 
to LR 00.

Indicates 
DM 0324

Indirect 
address

The expansion DM area is designed to provide memory space for storing oper-
ating parameters and other operating data for Link Units and Special I/O Units.
Up to 3,000 words of UM can be allocated as Expansion DM (in 1K-word incre-
ments) using the UM ALLOCATION operation in the Programming Console or
SSS. Expansion DM area addresses run from DM 7000 to DM 9999.

The data in the expansion DM area can be transferred to the Special I/O Unit
Default Area (DM 1000 to DM 1999) when starting the PC or via programming
instruction to easily change operating parameters, enabling rapid switching be-
tween control processes. The expansion DM area can also be used to store pa-
rameters for other devices connected in the PC system, e.g., Programmable
Terminal character string or numeral tables.

The expansion DM area is used to store operating parameters and cannot be
used in programming like the normal DM area. Expansion DM can only be over-
written from a Peripheral Device, retains status during power interruptions, and
cannot be used for indirect addressing.

The UM area can be allocated as expansion DM area in increments of 1K words.
Once expansion DM area has been created, it is saved and transferred as part of
the program, i.e., no special procedures are required when saving or transfer-
ring the program.

The procedure for the Programming Console’s UM ALLOCATION operation is
shown below. Refer to 4-6-3 Clearing Memory for details on the DATA CLEAR
and UM ALLOCATION instructions.

1. Clear memory.

CLR

RESET

SET

NOT

EXT

MONTR

Note UM allocation is not possible unless memory is cleared first.

2. The expansion DM area can be set to 0, 1, 2, or 3 K words. The following key

sequence creates a 2-KW expansion DM area (DM 7000 to DM 8999).

WRITE

CLR

FUN

VER

CHG

2

SET

9

7

1

3

Press the 0 Key to eliminate the expansion DM area (0 KW).

Press the 1 Key to allocate DM 7000 to DM 7999 (1 KW).

Press the 2 Key to allocate DM 7000 to DM 8999 (2 KW).

Press the 3 Key to allocate DM 7000 to DM 9999 (3 KW).