I/O Allocation Methods; I/O Allocations To Basic I/O Units - Omron SYSMAC CS Series Operation Manual

I/O Allocation Methods

Overview
Method Operation
Using actual Perform I/O table
mounted Units creation online.
Not using Edit the I/O tables
actual offline and transfer
mounted Units them to CPU Unit.
8-2

I/O Allocation Methods

8-2-1

I/O Allocations to Basic I/O Units

Automatic allocations according to
mounting position
Automatic allocations according to
mounting position
Partial manual
allocation without
restrictions by
mounting position
Note 1. Always create I/O tables either online or by editing them offline and trans-
ferring them to the CPU Unit. The CPU Unit will not be able to recognize
Basic I/O Units, Special I/O Units, CPU Bus Units, or Units on SYSMAC
BUS I/O Rack unless I/O tables are registered in the CPU Unit.
2. For CS1-H CPU Unit Ver. 2.0 or later, CPU Bus Units can be used even if
they are not registered in the I/O tables, this function is provided to enable
online connections from Programming Devices running on personal com-
puters (e.g., the CX-Programmer) and is not intended for normal system
operation. Always register I/O tables in the CPU Unit before starting oper-
ation.
3. The C200HX/HG/HE, C200H, and C200HS PLCs use fixed word alloca-
tions for slots, enabling operation without I/O tables. I/O tables were creat-
ed only to prevent Units from being mounted to the wrong slot. With the
CS-series PLCs, the words allocated to any particular slots are not fixed.
Words are merely allocated to the Units actually mounted. If no Unit is
mounted, no words are allocated. If the mounted Unit requires more than
one word, the required number of words is allocated. Operation for CS-se-
ries PLCs is thus not possible unless I/O tables are registered.
Basic I/O Units include the following Units:
• CS-series Basic I/O Units
• C200H Basic I/O Units
• C200H Group-2 High-density I/O Units
These Units are allocated words in the I/O Area (CIO 0000 to CIO 0319) and
can be mounted to the CPU Rack, CS-series Expansion Racks, and C200H
Expansion I/O Racks (See note 2).
1. Refer to 2-4 Units for list of specific Basic I/O Units.
Note
2. CS-series Basic I/O Units cannot be mounted to C200H Expansion I/O
Racks.
Allocations
Allocating Rack
first words
Allocation slot first
words
Rack allocation Slot allocation
order order within Rack
In order from Rack 0 Left to right from
to Rack 7 slot 00
In order from Rack 0 Left to right from
to Rack 7 slot 00
User-set Left to right from
slot 00
Left to right from
any slot allocated a
first word
Section 8-2
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