The __________ function will cause a machine to stop after finishing its current step, then resume operation with the next step when an input signal is received.

The Halt function is specifically designed to stop a machine after it completes its current step. This is particularly useful in programmable controller systems as it allows for operational control based on external signals. Once a machine has reached the end of its current operation, it will wait in a halted state until it receives the designated input signal to proceed to the next step.

This characteristic is crucial for ensuring safety and system integrity, as it allows for controlled pauses in operation, which can facilitate maintenance or monitoring without abruptly disrupting the entire system. The Halt function is therefore essential in scenarios where precise timing and conditions determine the next actions of the machine, making it a fundamental concept in programmable logic controller programming.