Out-Of-Group I/O Fetch; Accessing Controlled Module; Accessing Non-Controlled Module - Mitsubishi Electric MELSEC iQ-R Series User Manual

23.1

Out-of-group I/O Fetch

The access range to the controlled module is different from that to the non-controlled module. To fetch the data which cannot
be accessed, use the out-of-group I/O fetch function.

Accessing controlled module

The access range to the controlled module of the CPU module is the same as that to the single CPU system, and I/O refresh
for the controlled module and/or reading/writing to buffer memory of the intelligent function module are enabled.

Accessing non-controlled module

Access to the non-controlled module of the CPU module is limited to reading input (DX) and buffer memory of the intelligent
function module. Note that On/Off data of input (X)/output (Y) of the non-controlled module can be fetched using the out-of-
group I/O Fetch function. ( Page 336 Out-of-group I/O fetch setting)
: Accessible, : Not accessible
Communication Access target
method
Communication Input (X)
through refresh
Output (Y)
The buffer memory of the
intelligent function module
Link direct device
Communication Input (DX)
through direct access
Output (DY)
The buffer memory of the
intelligent function module
Link direct device
*1 Cannot read from CPU modules which are synchronized through the inter-module synchronization function.
Precautions
An error is not detected in reading input (DX) for the non-controlled module and buffer memory of the intelligent function
module.
Access range
When "Import" is selected in
the settings for out-of-group I/O
fetch
*1

Read to another
CPU module
 (Non-processing)
Write to another
CPU module
*1

Read to another
CPU module
 (Cannot be specified from
Read
engineering tools)
Write
Read  (Cannot be specified from
engineering tools)
Write
Read to another 
CPU module
 (Non-processing)
Write to another
CPU module
Read to another  (Cannot be specified)
CPU module

Read
Write  (An error occurs in the CPU
module.)
 (An error occurs.)
Read
Write
When "Not Imported" is
selected in the settings for
out-of-group I/O fetch
 (Non-processing)
 (Cannot be specified from
engineering tools)
 (Cannot be specified from
engineering tools)

 (Non-processing)
 (Cannot be specified)

 (An error occurs in the CPU
module.)
 (An error occurs.)
23 MULTIPLE CPU SYSTEM FUNCTION
23.1 Out-of-group I/O Fetch
23
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