//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/0750656794-CH01 2.3D – 151 – [151–156/6]
19.6.2004 9:12PM
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Entry ladder monitoring
Entry ladder monitoring is a method, which enables individual rungs in a ladder
diagram to be selected and monitored.
When fault finding, entry ladder monitoring is an extremely useful facility if the
rungs of the PLC program, which is controlling the operation of the process/machine,
are not grouped together in recognisable sections.
The selected rungs, which control the area where the fault occurred, can be displayed
and monitored on one screen and therefore the nature of the fault can be more quickly
determined and corrected.
To demonstrate the operati on of entry ladder monitoring, the ladder diagram
PNEU1 ...