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Creating I/O Tables Section 8-2
2. I/O Allocation Status Changes Due to Transfer of Parameter Files
Note 1. When parameter files (.STD) are created and saved in a Memory Card us-
ing user-specified I/O allocations with a CJ-series CPU Unit with unit Ver.
2.0, the system will automatically switch to automatic I/O allocation at star-
tup if the parameter file is transferred from the Memory Card using by a
user operation.
2. When parameter files (.STD) are created and saved in the Memory Card
using automatic I/O allocation at startup with a CJ-series CPU Unit with
unit version 2.0, the I/O allocation status will switch automatically to user-
specified I/O allocations if the parameter file is transferred from the Mem-
ory Card to a CJ-series CPU Unit with unit version 3.0 or later.
3. An I/O setting error will occur if a parameter file (.STD) created and saved
in a Memory Card using a CJ-series CPU Unit with unit Ver. 3.0 or later is
transferred from the Memory Card using a CJ-series CPU Unit with unit
Ver. 2.0 and user-specified I/O allocations. The I/O setting error will occur
after the parameter file is transferred. If this error occurs, cycle the power
and clear the error.
3.
I/O Allocation Status Changes Due to Backup/Restore Operations
The I/O allocation status depends on the unit versions of the source and des-
tination CPU Units when using a single CJ-series CPU Unit to create backup
parameter files (BKUP.STD), save them in the Memory Card, and then back
up or restore them to another CJ-series CPU Unit. The changes to I/O alloca-
Source CPU Unit Original I/O
allocation status
Destination CPU Unit
Unit version of CPU Unit to which parameter files will be
transferred
Pre-Ver. 2.0 Unit Ver. 2.0 Unit Ver. 3.0 or
later
CPU Unit’s unit
version used to
create parameter
files
Pre-Ver. 2.0 Automatic alloca-
tion
Switches to user-
specified
(Same) automatic
allocation
Switches to user-
specified
User-specified (Same) User-
specified
Switches to auto-
matic allocation
(See note 1.)
(Same) User-
specified
Unit Ver. 2.0 Automatic alloca-
tion
Switches to user-
specified
(Same) automatic
allocation
Switches to user
operation
User-specified (Same) User-specified
Unit Ver. 3.0 or
later
Automatic alloca-
tion
Switches to user-
specified
(Same) Automatic
allocation (See
note 3.) and an I/O
setting error
occurs.
(Same) Automatic
allocation
User-specified (Same) User-specified
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