9. EDITING PROGRAMS
Editing a program while executing another program is called background
editing. The method of editing is the same as for ordinary editing
A program edited in the background should be registered in foreground
program memory by performing the following operation:
During background editing, all programs cannot be deleted at once.
Procedure for background editing
1 Enter EDIT or MEMORY mode.
Memory mode is allowed even while the program is being executed.
2 Press function key
3 Press soft key
[(OPRT)], then press soft key [BG–EDT].
The background editing screen is displayed (PROGRAM
(BG–EDIT) is displayed at the top left of the screen).
4 Edit a program on the background editing screen in the same way as
for ordinary program editing.
5 After editing is completed, press soft key
[(OPRT)], then press soft
[BG–EDT]. The edited program is registered in foreground
Alarms that may occur during background editing do not affect
foreground operation. Conversely, alarms that may occur during
foreground operation do not affect background editing. In background
editing, if an attempt is made to edit a program selected for foreground
operation, a BP/S alarm (No. 140) is raised. On the other hand, if an
attempt is made to select a program subjected to background editing
during foreground operation (by means of subprogram calling or program
number search operation using an external signal), a P/S alarm (Nos. 059,
078) is raised in foreground operation. As with foreground program
editing, P/S alarms occur in background editing. However, to distinguish
these alarms from foreground alarms, BP/S is displayed in the data input
line on the background editing screen.
D Alarms during