EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Chapter 54, Problem 3RQ
Why are the contacts used to represent stop buttons and overload contacts programmed normally open?
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1.
A mixing vat has an inlet valve, an outlet valve, a mixing motor, and a single level detecting switch (Figure 1).
Both valves are opened by solenoids. The level switch closes when the vat is full and stays closed until the vat is
empty. Draw a PLC ladder logic diagram and provide the allocation list to do the
following:
a. When the start button is pushed, the inlet valve opens until the vat is full.
b. The mixer motor comes on for 5 min.
c. The outlet valve opens until the vat is empty.
(closed)
Level switch
Motor
Inlet valve
Outlet valve
Float
Vat
Figure 1
Bohar model Gizmo answer keys
In what ways do controllers for various devices aid in operation?
Chapter 54 Solutions
EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
Ch. 54 - Why are NEMA symbols representing such components...Ch. 54 - Explain how to program an internal relay into the...Ch. 54 - Why are the contacts used to represent stop...Ch. 54 - Why is the output I/O used to energize a motor...Ch. 54 - Prob. 5RQCh. 54 - When programming in Boolean, what command is used...Ch. 54 - When programming in Boolean, what command is used...Ch. 54 - When programming in Boolean, what command is used...Ch. 54 - Why are the numbers 8 and 9 not used in an OCTAL-...
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