Asked by Abhishek Mittal on Apr 26, 2024
Verified
Which of the following is the conditional instruction that controls the MCR zone? 
A) Stop
B) Start
C) Manual Automatic
D) Temperature Switch
MCR Zone
In Programmable Logic Controller (PLC) programming, an MCR Zone (Master Control Reset) is a designated area that controls the execution of sections of ladder logic code, typically enabling or disabling it.
Conditional Instruction
A programming command that executes a certain segment of code only if specific conditions are met.
- Understand the functional distinctions between retentive and nonretentive outputs and their conduct in an MCR zone.
- Differentiate among various PLC instructions, including conditional, immediate, retentive, and nonretentive types.
Verified Answer
IB
Isabelle BustamanteApr 29, 2024
Final Answer :
C
Explanation :
The MCR zone is typically controlled by a manual automatic switch, which allows the operator to switch between manual control and automatic control of the various devices and systems within the zone. Therefore, the correct option is C) Manual Automatic.
Learning Objectives
- Understand the functional distinctions between retentive and nonretentive outputs and their conduct in an MCR zone.
- Differentiate among various PLC instructions, including conditional, immediate, retentive, and nonretentive types.