Which one of the following statements about the Allen-Bradley PLC memory structures and addressing is NOT true?
A) The SLC 500 input module location dictates a part of the input instruction address.
B) There are two different systems: rack/slot-based systems and tag-based systems.
C) The SLC 500 uses the rack/slot address—based system with data files and program files.
D) The Logix system permits either rack/slot- or tag-based addressing.
D
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IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
A ________________ is a line element on the contour of a radial surface.
Fill in the blank(s) with the appropriate word(s).
The formula for inductive reactance is _____
a. XL = 1 ÷ 2?fL b. XL = 2 ÷ ?fL c. XL = 2? ÷ fL d. XL = 2?fL
To ensure priming, the pump should be installed so that the pump suction is lower than the tower basin's
A) deck material. B) cold-water level. C) air-inlet fan. D) inlet valve.