
//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/0750656794-CH020.3D – 202 – [200–213/14]
19.6.2004 9:16PM
Program monitoring
To monitor the operation of the program in real time, carry out the following
operations:
1. Download the program COUNT3 to the FX2N PLC.
2. Display the ladder diagram.
3. Press F3 for monitor mode.
4.ThedisplaynowbecomesasshowninFigure20.2,aftersixinputpulses.
5. The ladder diagram display shows that in addition to the inputs and outputs being
monitored, so can the contents of data register D0 be mon itored.
20.2 BCD counter ^ COUNT4
Each time the input X1 is operated, the 4 7 segment display connected to Y10–Y27
will ...