Author Question: Which one of the following PLC 5 addressing statements is NOT true? A) A group is 16 input ... (Read 65 times)

chandani · **on:** Jul 28, 2018

Which one of the following PLC 5 addressing statements is NOT true?

A) A group is 16 input terminals (one 16 bit input word) and 16 output terminals (one 16 bit output word).
B) Input and output (I/O) addressing connects a field device at a terminal on an I/O module to a bit location in the processor memory.
C) Terminals (called I/O points) attach field devices to PLC modules and to bits in processor memory.
D) Processors support up to 24 racks; the processor can be any one of the racks in the system.

Question 2

The ________ instruction is useful for troubleshooting timer ladder logic.

A) Progressive debug
B) Temporary end
C) Program halt
D) One Shot
E) There are no specific instructions for this purpose