Author Question: Which one of the following statements on the FAL modes is NOT true? A) In the numeric mode, a ... (Read 33 times)

bobbysung · **on:** Jul 28, 2018

Which one of the following statements on the FAL modes is NOT true?

A) In the numeric mode, a decimal number from 1 to 1000 indicates the number of elements operated on per scan.
B) In the all mode, a complete file is transferred in one scan.
C) In the pause mode, a decimal number from 1 to 1000 indicates the number of scans that the FAL instruction is not executed.
D) In the increment mode, one element of data is operated upon for each time the FAL rung goes from false to true.

Question 2

Which of the following is NOT a correct statement when troubleshooting timer ladder logic?

A) Most difficult ladder timer programs to test have linked or cascaded timers, large PRE values, and very slow execution times.
B) The timer dialog boxes are used to track timer data as the program executes.
C) Timers are tested starting with the first in the sequence, and then add one timer at a time until the total sequence is operational.
D) A PLC simulator from the PLC manufacturer helps in program verification and troubleshooting in the off-line mode.