Omron CVM1D, Operation Manual

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35
CPU Rack
Starting point
Empty slots or Units not
requiring word allocation
(no words allocated)
CPU Unit Power Supply Unit
Power Supply Unit
Expansion CPU Rack
I/O Control Unit
I/O Interface Unit
Rack #1
Basic I/O Allocation I/O Word Allocation Example
CPU Rack
Expansion I/O Rack
Expansion I/O Rack
To next rack
Power Supply Unit
DPL
Unit
CPU Unit Power Supply Unit
CPU Unit Power Supply Unit DPL
Unit
Power Supply Unit CPU Unit
CIO 0000 CIO 0001 CIO 0002 and 0003 CIO 0004 CIO 0005
CIO 0006 and 0007 CIO 0008 CIO 0009 CIO 0010 CIO 001
1
CIO 0012 CIO 0013 and 0014 CIO 0015 Empty (no allocation) CIO 0016
Power Supply Unit Power Supply Unit
CIO 0024 CIO 0025 CIO 0026 CIO 0027 CIO 0028 CIO 0029 CIO 0030 CIO 0031 CIO 0032 CIO 0033
Power Supply Unit Power Supply Unit
Expansion I/O Rack
CIO 0017 CIO 0018 CIO 0019 CIO 0020 CIO 0021 CIO 0022 CIO 0023 Empty (no allocation) Empty (no allocation) Empty (no allocation)
Power Supply Unit Power Supply Unit
Rack #0
Rack #1
Rack #2
Rack #3
Once Units have been mounted and the I/O Table Registration operation has
been performed, a change to any Unit mounted to a Rack that affects the type of
I/O word, or the number of words required by the Unit will cause an I/O verifica-
tion error to occur. This includes adding Units to previously unused slots or re-
moving Units that have already been allocated word(s). A Unit can, however, be
replaced with another Unit that requires the same number of input words and the
same number of output words without generating an I/O verification error.
Dummy I/O Units are available to fill slots for future use or to replace Units that
are no longer needed (see Word Reservations, below). Rack Changes
CIO (Core I/O) Area
Section 3-3