Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 263

I/O Allocations
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.
Setting the First Words for Specific Slots
A word is set for slot 00 on the CPU Rack for group 00.
Rack 0
Rack 1
A word is set for slot 02 on Rack 1 for group 02.
Note The first words for Racks cannot be set at the same time as the first words for
slots.
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, or CPU Bus Units unless I/O tables are
registered in the CPU Unit.
2. For 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 Pro-
gramming Devices running on personal computers (e.g., the CX-Program-
mer) and is not intended for normal system operation. Always register I/O
tables in the CPU Unit before starting operation.
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.
A word is set for slot 02 on the CPU Rack for group 01.
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 7-1
227