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PLC counter instructions provide this in PLC programs.

• Math instructions

• Messaging instructions

• Count-based logic

• Time-based logic

This type of counter instruction counts from 0 to a preset value before turning on its output.

• Timer off-delay (TOF)

• Count Up (CTU)

• Timer on-delay (TON)

• Count Down (CTD)

This input is used to increment the count value of a CTU counter instruction.

• Count Value (CV)

• Count Up (CU)

• Count Down (CD)

• Preset Value (PV)

This instruction decreases its count value (CV) by one each time its input turns from false to true.

• Timer on-delay (TON)

• Timer off-delay (TOF)

• Count Down (CTD)

• Count Up (CTU)

PLCs commonly use which types of instructions to stop a machine after a certain number of parts are produced?

• NC contact instructions

• Timer instructions

• CTU and CTD instructions

• NO contact instructions

A CTU accumulation is reset by the _______ instruction.

• Overflow instruction

• Reverse instruction

• Reset instruction

• Preset Value

The Counter enable pin is enabled when the rung is __________

• True

• False

When signal state changes from 0 to 1 in LD input of CTD (Down counter),then

• CV will Reset

• PV will Reset

• The Value at CV is set to the value of PV

• The Value at PV is set to the value of CV

In PLC UP counter for which Input transition the current valve of counter is incremented

• Rising Edge

• Trailing Edge

• Falling Edge

• None of the Above

In PLC Down counter for which Input transition the current valve of counter is Decremented

• Rising Edge

• Falling Edge

• Trailing Edge

• None of the Above