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-CH027.3D – 283 – [282–292/11]
19.6.2004 9:20PM
27.2 System requirements
To meet the system requir ements, the following design was formulated.
1. At station 1, a sensor connected to X0 is used to detect that an empty jar had been
inserted into the rotary index table.
2. The jar is then filled with pickled onions.
3. The operator on observing that a jar is at station 1 and that it has been filled with
pickles will operate the foot switch connected to X1 to cause the jar to move to
position 2. At the same time a logic 1 will be inserted into M 2 of shift register 1.
4. The jar will now be tracked through one complete index cycle using a 10-bit shift
register, i.e. shift register 1, ...
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