KEYENCE KV Series - Manual (Page 128)

Chapter 3 Simulator
2-104
3
Executing a step once in the reverse direction
Execute ➔ Execute One Step in Reverse (F7)
After a step is executed once, a step is executed continuously, or steps are ex-
ecuted at high speed, these steps can be re-executed one at a time in the reverse
direction.
To execute a step once in the reverse direction, select "Execute One Step in Re-
verse" from the "Execute" menu, or click the
button.
Executing a step continuously in the reverse direction
Execute ➔ Execute Continuous Step in Reverse (Shift + F7)
After a step is executed once, a step is executed continuously, or steps are ex-
ecuted at a high speed, these steps can be re-executed continuously in the reverse
direction.
To execute a step continuously in the reverse direction, select "Execute Continuous
Step in Reverse" from the "Execute" menu, or click the
button.
■ Executing a step in the reverse direction
When a step is executed in the reverse direction, all the items which changed due to
the execution of the program are returned to their original status. This includes the
device values and the bus status.
By using this function, debugging can be performed efficiently because the operation
of the ladder program (changes in the operation caused by ON/OFF of contacts and
word device values entered) can be recovered for each instruction, and then con-
firmed.
When execution reaches
the top, the cursor
returns to "ENDH".
One step (instruction) is
executed every time the
button is clicked.
When execution reaches
the top, the cursor
returns to "ENDH".
One step (instruction) is
continuously executed in
the reverse direction.
▲
▲
▲
▲
▲
▲
▲
▲
▲
KVSKA Chap 03.P65 08.3.11, 11:29 AM 104