Omron NJ-series User Manual page 374

Refreshing task
Program P1
External variable GVar1
GVar 1
(global
variable)
Primary periodic task
(refreshing task)
P1.GVar1
(external
variable)
Number of times
condition for GVar1 is
met (change to TRUE)
Periodic task
(accessing task)
P2.GVar1
(external
variable)
Number of times
condition for P2.GVar1 is
met (change to TRUE)
NJ-series CPU Unit Software User's Manual (W501)
Read/write
Global variable GVar1
The GVar1 global variable is updated as soon as P1 writes a value to the
P1.GVar1 external variable.
TRUE
FALSE
Timing for condition evaluation by differential monitoring
Primary period
P1 P1 P1
TRUE is FALSE is
written. written.
TRUE
FALSE
0 1
Task period
P2
TRUE
FALSE
The value of the P2.GVar1 external variable is updated only when
P2 is executed.
0
Accessing task
Program P2
Reading
External variable GVar1
P1 P1 P1
TRUE is FALSE is TRUE is FALSE is
written. written. written. written.
2
P2
1
8 CPU Unit Functions
P1 P1
TRUE is FALSE is
written. written.
4
3
P2
2
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