Dm Area Allocations - Omron C200H-ASC11 Manual

DM Area Allocations

3-2 DM Area Allocations
3-2-1 Overview
Allocated in
Setup Area (10
words)
100 words
Allocated in
IORD/IOWR
Area (90 words)
or work bits (See
note 2.)
DM Area Allocation
Unit No.
0 DM 1000 to DM 1099
1 DM 1100 to DM 1199
2 DM 1200 to DM 1299
3 DM 1300 to DM 1399
4 DM 1400 to DM 1499
5 DM 1500 to DM 1599
38
Each ASCII Unit is also allocated 100 words as shared memory from the CPU
Unit's Data Memory Area. The unit number determines which 100 words are
allocated. The shared memory (100 words) in the ASCII Unit is divided into
two regions as follows:
• Setup Area (10 words):
• IORD/IOWR Area (90 words):
The ASCII Unit's internal shared memory does not have a battery backup.
When the power supply is turned off, it will return to default values. Data from
the CPU Unit will be resent every time the power is turned on or the Unit is
restarted.
The first word allocated to the ASCII Unit in the DM area and the first word in
the shared memory in the ASCII Unit is "m."
CPU Unit
DM Area
m
m+1
m+2
:
m+9
m+10
m+99
Note 1. The IORD/IOWR Area can be set to be transferred or not transferred in bits
08 to 11 of word m+1 in shared memory in the Setup Area.
2. The IORD/IOWR Area (m+10 to m+99) can be used as work bits when not
used for the transfer to the ASCII Unit as described in note 1.
C200HX/HG/HE, C200H, C200HS
Words Unit No.
6
7
8
9
---
---
Note Unit numbers A to F are used for the C200HG-CPU53-E/63-E/53-ZE/63-ZE
and C200HX-CPU54-E/64-E/54-ZE/64-ZE/65-ZE/85-ZE only.
Words 0 to 9
Words 10 to 99
ASCII Unit
Words
0
1
2
Transferred at power ON
or when Unit is restarted
:
9
10
Transferred at power ON
or when Unit is restarted
(See note 1.)
99
Words
DM 1600 to DM 1699
DM 1700 to DM 1799
DM 1800 to DM 1899
DM 1900 to DM 1999
---
---
m = First word in DM Area.
Shared
memory
Setup Area
(10 words)
IORD/IOWR Area
(90 words)
Unit No.
A DM 2000 to DM 2099
B DM 2100 to DM 2199
C DM 2200 to DM 2299
D DM 2300 to DM 2399
E DM 2400 to DM 2499
F DM 2500 to DM 2599
Section 3-2
Words