The PLC functions which generate output signals according to logical operations performed on input signals are known as:

The PLC functions which generate output signals according to logical operations performed on input signals are known as: Correct Answer control relay functions

Timing Functions:

• Use this instruction to program a time delay after instructions become true.
• On–delay timers are used when an action is to begin a specified time after the input becomes true.
• For example, a certain step in manufacturing is to begin 45 seconds after a signal is received from a limit switch. The 45- seconds delay is the on-delay timer's preset value.
   

Control Relay Functions:

• It generates output signals according to logical operations performed on input signals.
• They are used to isolate one voltage level from another.
   

Arithmetic Functions: Programmable Logic Controller has arithmetic functions like Comparator, Mathematical, Logarithmic, etc.

Counting Functions: A counter is a PLC instruction that either increment (counts up) or decrements (counts down) an integer number value when prompted by the transition of a bit from 0 to 1 (“false” to “true”).