True/False Indicate whether the
statement is true or false.
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1.
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After the count value reaches the preset value stored in a counter memory
location, the counter turns off its output.
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2.
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Counters can control both external output and input instructions, just like
timers.
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3.
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A count up instruction is the most common type of counter instruction.
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4.
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A CTU timer cannot be reset.
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5.
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A CTD counter has a Load input.
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6.
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The CTUD counter instruction combines a CTU and CTD instruction.
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Multiple Choice Identify the
choice that best completes the statement or answers the question.
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7.
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A _________ counter is used to control a process that must be kept withing high
and low limits.
a. | CTU | c. | CTUD | b. | CTD | d. | Retentive |
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8.
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All counter instructions use a ________ format, which uses multiple inputs and
outputs.
a. | coil | c. | midichlorian | b. | reset | d. | block |
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9.
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The Counter Name is the _________ address assigned to the
instruction.
a. | stargate | c. | symbolic | b. | input | d. | output |
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10.
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The CTD instruction loads the ____ into its CV when its Load input turns
true.
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Completion Complete each
statement.
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11.
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A counter operates very similarly to a retentive on-delay timer instruction
except that it counts up or down by one each time its ________ turns true.
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12.
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The instruction stores the current value in a location called the _______
value.
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13.
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Counter instructions control input instructions by assigning a counter _______
bit address to the input instruction.
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14.
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Counter instructions are used to control the number of machine cycles performed,
keep track of data such as parts produced or rejects, and trigger an _________ after a certain number
of other events have occurred.
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15.
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A ____ instruction can be used to tell the operator the number of counts that
have taken place.
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16.
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The count up input (CV) is used to __________ the count value (CV) of a CTU
counter instruction.
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17.
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The count value, CV represents the number of times the CU input has ____________
from false to true.
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18.
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The _________ input is used to reset a CTU instruction.
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Matching
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19.
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Counts up from 0 to a preset value before turning on its output.
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20.
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Counts the difference between the up count and down count values.
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21.
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Counts down from a preset value to 0 before turning on its output.
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Identify the correct type of counter block
a. | CTD counter | c. | CTUD | b. | CTU counter |
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22.
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23.
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24.
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