194
Interrupt Tasks Section 4-3
Note The leftmost bits of A426 (Interrupt Task Error, Task Number) can be used to
determine which of the above interrupt task errors occurred. (Bit 15: 10 ms or
higher execution error if 0, multiple refresh error if 1)
IORD(222)
IOWR(223)
PLC Setup
When using the CX-Programmer, make the settings on the CPU Settings Tab
Page.
IORD
END
C
W
D
Special I/O Unit
Read memory area
Interrupt task
Incorrect Use Correct Use
Cyclic refreshing is enabled
for a Special I/O Unit in the
PLC Setup (the default
setting), and IORD(222) is
executed in an interrupt
task to read that Special I/O
Unit's allocated words.
Cyclic refreshing is disabled
for a Special I/O Unit in the
PLC Setup, and IORD(222)
is executed in an interrupt
task to read that Special I/O
Unit's allocated words.
IOWR
END
C
S
W
Special I/O Unit
Interrupt task
Incorrect Use Correct Use
Write memory area.
Cyclic refreshing is enabled
for a Special I/O Unit in the
PLC Setup (the default
setting), and IOWR(223) is
executed in an interrupt
task to write that Special I/O
Unit's allocated words.
Cyclic refreshing is disabled
for a Special I/O Unit in the
PLC Setup, and IOWR(223)
is executed in an interrupt
task to write that Special I/O
Unit's allocated words.
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