3
-
3
CHAPTER3 CPU MODULE OPERATION
3
3.4 END
Processing
3.4 END Processing
The CPU module performs refresh processing with network modules and communication with external
devices.
END processing includes the following.
: Executed, : Not executed
●
When the constant scan function (
Section 6.2) is used, the results of processing performed in END processing
are held for the period between after END processing is completed and until the next scan starts.
●
When the low-speed execution type program is executed, low-speed END processing is performed after all low-speed
execution type programs are executed. (
Table3.2 END processing list
Item
CPU module
Reference
Basic model
QCPU
High Performance
model QCPU
Process
CPU
Redundant
CPU
Refresh with network modules
Auto refresh with intelligent function module
Intelligent function module dedicated
instruction processing
Service processing
Watchdog timer reset
Auto refresh between multiple CPU modules
QCPU User's
Manual (Multiple
CPU System
Device data collection using the sampling
trace function (only when trace point is set to
every scan (after END instruction execution))
Self-diagnostics processing
Special relay/special register value setting
(only for those that should be set during END
processing)
QCPU User's
Manual (Hardware
Design,
Maintenance and
Inspection)