Specifications

Table Of Contents
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5.11 Task operation
The timing to execute the SFC program can be set once for each program with the
program parameter. The task is roughly classified into three types as shown in the
following table.
Task type Contents
Normal task Execution at motion main cycle (dead time)
Event task 1. Execution at constant cycle (0.8ms, 1.7ms, 3.5ms, 7.1ms, 14.2ms)
2. Execution when input set for event task, of external interrupt (16 points
of QI60), is turned ON
3. Execution only by interrupt from PLC
NMI task
(Non-Maskable
Interrupt)
Execution when input set for NMI task, of external interrupt (16 points of
QI60), is turned ON
(1) Normal task
The SFC program is executed at main cycle (dead time) of the Q motion CPU
process.
POINT
(1) Set the SFC program (including motion control step) to "Normal task".
(2) Execution of normal task is interrupted while the event task/NMI task is being
executed.
Note that when using a normal task, an event task prohibit command (DI) can
be described in the operation control step. Thus, interruption of the event task
can be prohibited in the section enclosed by the event task prohibit command
(DI) and event task permit command (EI).