Background Execution Settings - Omron CJ2 CPU - REV 10-2010 User Manual

9 PLC Setup

Background Execution Settings

The following instruction will have a large affect on the cycle time, depending on the amount of data
handled by the instruction. The background execution settings can be used to divide processing of the
instructions over more than one cycle, to reduce the affect on the cycle time. Refer to 10-2-5 Back-
ground Execution for details.
Table Data Process Instructions
This parameter determines whether to process Table Data Instructions in the background.
Parameter
Table data OFF: Not executed
process in background.
instructions
ON: Executed in
background.
String Data Process Instructions
This parameter determines whether to process String Data Instructions in the background.
Parameter
String data OFF: Not executed
process in background.
instructions
ON: Executed in
background.
Data Shift Process Instructions
This parameter determines whether to process Data Shift Instructions in the background.
Parameter
Data shift OFF: Not executed
process in background.
instructions
ON: Executed in
background.
Com Port Number
This parameter sets the communications port number used in background processing.
Parameter
Com Port 0 to 7: Communica-
number tions ports 0 to 7
(internal logical
ports)
Precautions for Correct Use Precautions for Correct Use
Background processing cannot be used in interrupt tasks if high-speed interrupt function is
enabled in the PLC Setup. An instruction processing error will occur.
9-12
Settings Default
OFF
Settings Default
OFF
Settings Default
OFF
Settings Default
0 (No. 0)
Function
This setting determines if Table Data Instruc-
tions will be processed over multiple cycle
times (i.e., processed in the background).
Function
This setting determines if String Data Instruc-
tions will be processed over multiple cycle
times (i.e., processed in the background).
Function
This setting determines if Data Shift Instruc-
tions will be processed over multiple cycle times
(i.e., processed in the background).
Function
The communications port number (internal log-
ical port) that will be used for background exe-
cution.
CJ2 CPU Unit Software User's Manual
Related
flags and
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Related
flags and
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Related
flags and
words
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Related
flags and
words
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