Mitsubishi Electric MELDAS C6 Interface Manual page 200

B con-
Signal name
tact
*
DATA PROTECT KEY 2
[Function]
Data pertinent to user parameters and common variables can be protected.
[Operation]
When this signal (KEY2) is turned OFF (0), the parameter and common variable setting operation is
prohibited.
[Cautions]
(1) If a setting is changed while the signal (KEY2) is OFF (0), DATA PROTECT appears in the
message display area of screen.
(2) In C6/C64, the signal (KEY2) is ON (set to "1") when the power is turned ON (data are not
protected). Therefore, if the signal is not turned OFF in sequential control program, it remains
turned ON ("1").
[Related signals]
Data protect key 1 (*KEY1: Y418)
Data protect key 3 (*KEY3: Y41A)
B con-
Signal name
tact
*
DATA PROTECT KEY 3
[Function]
Data pertinent to machining program can be protected.
[Operation]
When this signal (KEY3) is turned OFF (0), the editing of the machining program is prohibited.
[Cautions]
(1) If data is edited when the data protect key 3 is OFF (0), DATA PROTECT will appear in the
message display area of screen.
(2) In C6/C64, the signal (KEY3) is ON (set to "1") when the power is turned ON (data are not
protected). Therefore, if the signal is not turned ON in sequential control program, it remains
turned ON ("1").
[Related signals]
Data protect key 1 (*KEY1: Y418)
Data protect key 2 (*KEY2: Y419)
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
*KEY2
Signal
abbreviation
*KEY3
6-3-3
1st system 2nd system
Y419 —
1st system 2nd system
Y41A —
3rd system
—
3rd system
—