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Trial Operation and Debugging Section 10-2
10-2-2 Differential Monitoring
When the CPU Unit detects that a bit set by the CX-Programmer has changed
from OFF to ON or from ON to OFF, the results are indicated in the Differenti-
ate Monitor Completed Flag (A508.09). The Flag will turn ON when conditions
set for the differential monitor have been met. The CX-Programmer can moni-
tor and display these results on screen.
CX-Programmer Operation
1,2,3... 1. Right-click the bit for differential monitoring.
2. Click Differential Monitor from the PLC Menu. The Differential Monitor Di-
alog Box will be displayed.
3. Click Rising or Falling.
4. Click the Start Button. The buzzer will sound when the specified change is
detected and the count will be incremented.
5. Click the Stop Button. Differential monitoring will stop.
Related Auxiliary Bits/Words
CPU Unit
Bit A
I/O memory
Moni-
tored for
OFF to
ON transi-
tion.
CX-Programmer
Detects bit A OFF
to ON transition.
Name Address Description
Differentiate Monitor
Completed Flag
A508.09 Turns ON when the differential monitoring condition has been met dur-
ing differential monitoring.
Note: The flag will be cleared when differential monitoring is started.
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