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1 explain how a tachometer is used to measure rotational speed2 how does an optical encoder work3 explain the function
1 outline the method used to actuate inductive and capacitive proximity sensors2 how are reed switch sensors actuated3
1 what are the two basic components of a photoelectric sensor2 compare the operation of the reflective-type and
1 how does an ultrasonic sensor operate2 explain the principle of operation of a strain gauge3 explain the principle of
study the ladder logic program in figure 7-43 and answer the questions that followa what is the purpose of
identify the type of counter you would choose for each of the following situationsa count the total number of parts
1 what determines the maximum speed of transitions that a plc counter can count why2 study the ladder logic program in
1 when is the output of a plc counter energized2 when does the plc counter instruction increment or decrement its
a when is the overflow bit of an up-counter setb when is the underflow bit of a down-counter set2 describe two common
study the ladder logic program in figure 8-41 and answer the questions that followa what type of counter has been
design a plc program and prepare a typical io connection diagram and ladder logic program that will execute the
1 what takes place with regard to a data transfer instruction2 the mov instruction is to be used to copy the
1 list three types of data shifts used with file instructions2 list the six parameters and addresses that must be
1 what is the advantage of using the file copy cop or fill file fll instruction rather than the fal instruction for the
1 what does the limit test lim instruction test values for2 how are multibit io interfaces different from the discrete
1 in general what do data manipulation instructions allow the plc to do2 explain the difference between a register or
1 explain the selectable timed interrupt function2 explain the function of the fault routine file3 how is the temporary
1 a what does the forcing capability of a plc allow the user to dob outline two practical uses for forcing functionsc
a explain what the jump-to-subroutine instruction allows the program to dob in what type of machine operation can this
1 what is the main advantage of the jump instruction2 what types of instructions are not normally included inside the
study the data transfer counter program of figure 10-50 and answer the following questionsa what determines the preset
1 compare the operation of open-loop and closedloop plc systems2 outline the control process involved with simple plc
answer each of the following with reference to the event-driven sequencer program shown in figure 12-43a when does the
using whatever plc sequencer output instruction you are most familiar with develop a program to implement an automatic