July 2004
Intermediate to advanced
352 pages
9h 30m
English
Content preview from Mitsubishi FX Programmable Logic Controllers, 2nd Edition
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//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/0750656794-CH005.3D – 62 – [55–65/11] 19.6.2004
9:07PM
5.7 Verificat ion
Situations may arise, when due to extensive mod ifications to a PLC project, the
program in the PLC may be different to that stored on the disk.
However, it is possible to verify whether or not the programs stored in the PLC and
on the disk are identical, and if not identical, what those differences are.
Also, when a program is to be monitored (see Chapter 6), then it is very useful if the
documented ladder diagram can be displayed, whilst it is being monitored.
The difficulty, though, is that it is not always practical ...
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