Omron DRT1 Series - Page 39

23
Starting Communications Section 2-4
• The following procedure shows how to create and register scan lists.
1,2,3... 1. Monitor IR 100 (software switches).
2. Turn ON bit 00 (Scan List Enable Bit).
3. Monitor IR 101 (Master Status Area 1), and check that bit 09 (scan list op-
eration end) turns ON.
4. Turn OFF bit IR 10000. The scan list will be created, registered, and I/O
communications will start with the scan list enabled.
Software Switches and Status Area
The software switches and Status Area are allocated in IR words according to
the Master Unit’s unit number as shown in the following diagram.
c100
0000
c100
0001
c101
9200
c100
0000
00
0
MONTR
CHG
1
SHIFT
CH
1
WRITE
WRITE
CHG
Master Unit
C200HX/HG/HE/HS CPU Unit
IR Area
IR 100
IR 190
Unit No. 0
Unit No. 9
Unit No. 0
Software switch: 1 word
Status Area: 9 words
Unit No. 0 to 9
First word: 100 + (10 × unit No.)
Unit No. A to F
First word: 400 + 110 × (unit No. –10)
10 words
Unit No. 0
Status Area: 2 words
First word: DM 6032 + (2 × unit No.)
IR 100
IR 101
IR 109
IR 400
IR 450
Unit No. A
Unit No. F
Unit No. 0
Unit No. 1
Unit No. F
DM Area