HEIDENHAIN TNC 640 User Manual page 744

17
Protecting presets from being overwritten
You can protect any rows in the preset table from being overwritten
with the LOCKED column. The write-protected rows are color-
highlighted in the preset table.
If you want to overwrite a write-protected row with a manual
probing cycle, confirm with OK and enter the password (where
password-protected).
Caution: Data may be lost!
Rows that were locked with the LOCK / UNLOCK PASSWORD
function can be unlocked only with the selected password.
Forgotten passwords cannot be reset. This means that locked
rows would be locked permanently. The preset table would thus
no longer be fully usable.
Prefer the alternative function LOCK / UNLOCK
Note down your passwords
Proceed as follows to protect a preset from being overwritten:
Press the CHANGE PRESET soft key
Select the LOCKED column
Press the EDIT CURRENT FIELD soft key
Protection for a preset without using a password:
Press the LOCK / UNLOCK soft key
The control writes an L in the LOCKED column.
Use a password to protect a preset:
Press the LOCK / UNLOCK PASSWORD soft key
Enter the password in the pop-up window
Confirm with the OK soft key or with the ENT
key:
The control writes ### in the LOCKED column.
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NOTICE
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Manual Operation and Setup | Managing presets