Mitsubishi Electric 800 Series Instruction Manual page 132

 Disabling the setting dial and keys on the operation panel (by holding
down the MODE key for 2 seconds)
• Operation using the setting dial and keys of the operation panel can be disabled to prevent parameter changes,
unexpected starts or frequency changes.
• Set Pr.161 to "10 or 11" and then press the MODE key for 2 seconds to disable setting dial or key operations.
• When the setting dial and key operation are disabled, "HOLD" appears on the operation panel. If setting dial or key
operation is attempted while dial and key operations are disabled, "HOLD" appears. (After no setting dial or key operation
for 2 seconds, the display returns to the monitoring screen.)
• To enable the setting dial and key operation again, press the MODE key for 2 seconds.
NOTE
• Even if setting dial and key operations are disabled, the monitor indicator and STOP/RESET key are enabled.
• The PU stop warning cannot be reset by using keys while the key lock function is enabled.
Parameters referred to
Pr.1 Maximum frequencypage 211
7. (E) Environment Setting Parameters
7.3 Automatic frequency setting / key lock operation selection
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