True/False
Indicate whether the
statement is true or false.
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1.
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PLC programs that use discrete I/O handshaking include bits within the logic to
turn the handshaking signals on or off given the state of the rung.
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2.
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A multiple station FMS can use handshaking signals to alter functions at only
one station to manufacture variations to a base product.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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3.
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Discrete handshaking is typically used for distances _____________.
a. | less than 50 feet | c. | 50 - 100 feet | b. | more than 50 feet | d. | over 100 feet |
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4.
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Interfacing between PLC’s is straightforward if each PLC uses the same
types of ______________.
a. | interface modules | c. | input and output modules | b. | communication
modules | d. | power
modules |
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5.
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A master station start bit is placed in _________ to the start pushbutton in the
station logic.
a. | series | c. | a separate run | b. | parallel | d. | it doesn’t go in the station
logic |
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6.
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A master halt button ______________.
a. | ends the station cycle | c. | pauses the station cycle | b. | acts as an emergency
stop | d. | stops the first
station only |
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7.
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NFPA standard 79 states that emergency stop pushbuttons must be located
_____________.
a. | at the master control panel | c. | next to the
machine | b. | on the first operator station | d. | at each operator control station and other
locations if needed |
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8.
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A master cycle stop __________________.
a. | provides an orderly shutdown of the line | c. | pauses the station
cycle | b. | acts as an emergency stop | d. | ends the station cycle |
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9.
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A master reset signal ____________.
a. | resets the stations one at a time | c. | resets just the last program
sequence | b. | resets all of the stations at the same time | d. | is poor programming
practice |
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10.
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Devices such as a BCD thumbwheel switch allow an operator to
_______________.
a. | change PLC programs | c. | change PLC program preset values | b. | change part
colors | d. | none of the
above |
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