User's Manual

Page 29 SITRANS LR 400 – INSTRUCTION MANUAL 7ML19985FH04
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Operation
Disabling and Enabling Programming
To prevent unauthorized personnel causing programming errors through the display
module, set a customer code – a personal, freely selectable code number up to 9 digits. A
device protected by a customer code still displays all functions and values but it requests
input of the code number before allowing a parameter to be reset.
Programming is enabled when you:
• enter the requested customer code for the current parameter. (Only the current
parameter is enabled for reprogramming. All the others are still waiting for input of
the customer code.)
or
• release the programming lock for all parameters at once using the Code Input
Parameter (see Parameter 5.1 on page 62).
The programming lock will be released for approximately 10 minutes.
When you return to the multi-display or enter a number in the Code Input parameter
which is different from the customer code, or do not operate the device for 10 minutes,
the programming lock is enabled.
Note: The customer code is activated 10 minutes after you have programmed
Parameter 5.2 Customer Code.
Note: If Customer Code (Parameter 5.2) is 0, programming of parameters is always
enabled. We strongly recommend that a customer code be entered after all
programming is completed to secure the programmed values from change.