I/O Allocations To Cpu Bus Units; I/O Allocations To Sysmac Bus Slave Racks - Omron SYSMAC CS Series Operation Manual

I/O Allocation Methods
8-2-3

I/O Allocations to CPU Bus Units

Word Allocations
Example
Slot
0 C200H-ID212 16-point DC Input Unit
1 C200H-ASC02/11/21/31 ASCII Unit
2 C200H-SCU21-V1 Serial Communications Unit 25
3 C200H-OD21A 16-point Transistor Output Unit
4 C200H-SCU21-V1 Serial Communications Unit 25
8-2-4

I/O Allocations to SYSMAC BUS Slave Racks

Each CPU Bus Unit is allocated 25 words in the CPU Bus Unit Area
(CIO 1500 to CIO 1899) according the unit number set on the Unit. CPU Bus
Units can be mounted to the CPU Rack or CS-series Expansion Racks.
The following table shows which words in the CS-series CPU Bus Unit Area
are allocated to each Unit.
Unit number
0
1
2
:
15
CS-series CPU Bus Units are ignored during I/O allocation to Basic I/O Units.
Slots containing CS-series CPU Bus Units are treated as empty slots and
aren't allocated any words in the I/O Area.
The following example shows the I/O word allocation to Basic I/O Units, Spe-
cial I/O Units, and CS-series CPU Bus Units in the CPU Rack.
IN
16
CIO
0000
Unit
Each SYSMAC BUS Remote I/O Slave Rack is allocated 10 words in the
SYSMAC BUS Area (CIO 3000 to CIO 3079) according the unit number (0 to
7) set on the Slave Unit. No words in the I/O Area are allocated to Units in
Slave Racks.
Each slot in the Slave Rack is allocated one of the Rack's 10 words. The
words are allocated from left to right. One word is allocated to every slot even
if the slot is empty and the last two words allocated to each Rack are not used
because the Slave Racks have only 8 slots.
The Master and Slave Units themselves do not require any words.
Words allocated
CIO 1500 to CIO 1524
CIO 1525 to CIO 1549
CIO 1550 to CIO 1574
:
CIO 1875 to CIO 1899
Special OUT
CPU CPU
I/O 16
Bus Bus
Unit
Unit Unit
CIO CIO CIO CIO
2000 1500 0001 1525
to to
2009 1521 1549
Words Words allocated
required
1 CIO 0000
10 CIO 2000 to
CIO 2009
CIO 1500 to
CIO 1524
1 CIO 0001
CIO 1525 to
CIO 1549
Section 8-2
CPU Rack
to
Unit
number
--- Basic I/O Unit
0 Special I/O Unit
0 CS-series CPU Bus
Unit
--- Basic I/O Unit
1 CS-series CPU Bus
Unit
Group
391