
B-63943EN-1/02 14.DISPLAY/SET/EDIT
- 1801 -
NOTE
Change protection checking of data basically
covers the changes made by MDI operation. The
changes made by operations are not covered.
For example, programmable parameter input by the
G10L50 command can be changed regardless of
the operation level or the change protection level of
the parameter.
To protect data from being changed by an invalid
program, set an appropriate change protection level
for program edit operation to prevent an invalid
program from being created.
Signal
Memory protection signals KEY1 to KEY4<G046#3 to #6>
[Classification] Input signal
[Function] These signals select the operation level for the 8-level data protection
function.
The correspondence between signals and operation levels is shown
below.
Operation
level
KEY4 KEY3 KEY2 KEY1
3 0 1 0 0
2 0 0 1 0
1 0 0 0 1
0 0 0 0 0
NOTE
When a combination other than the above is set,
operation level 0 is assumed.
[Caution] When the 8-level data protection function is not used, these signals are
used as memory protection keys.
Note that what these signals indicate changes depending on whether
the 8-level data protection function is used.
Signal address
#7 #6 #5 #4 #3 #2 #1 #0
G046 KEY4 KEY3 KEY2 KEY1
Operation/setting screen
Various settings or display about operation levels or protection levels
can be performed on the following screens.
- Password change screen
- Operation level setting screen
- Protection level setting screen
- Directory list screen