Programming Security - Siemens sitrans LU10 Instruction Manual

Parameter Reset Features
On initial power up, all parameters are at "original" values. In many cases, when a
Parameter Value is altered, associated Parameter Values are automatically altered
accordingly. When a Parameter Number is accessed, if the preset Parameter Value
displayed is acceptable, no entry is required.
To return an operator adjusted Parameter Value to the preset value, with the appropriate
Point Number and Parameter Number displayed:
Press
To reset numerous parameters to preset values, refer to Master Reset (P999).
Perform a Master Reset (P999) if the SITRANS LU10 was "bench tested" using Perform a Master Reset (P999) if the SITRANS LU10 was "bench tested" using Perform a Master Reset (P999) if the SITRANS LU10 was "bench tested" using Perform a Master Reset (P999) if the SITRANS LU10 was "bench tested" using
arbitrary Parameter Values before system installation, following an EPROM arbitrary Parameter Values before system installation, following an EPROM
arbitrary Parameter Values before system installation, following an EPROM arbitrary Parameter Values before system installation, following an EPROM
replacement, or whenever complete reprogramming is required. replacement, or whenever complete reprogramming is required.
replacement, or whenever complete reprogramming is required. replacement, or whenever complete reprogramming is required.
Special Parameters
Some Parameter Values are for display purposes only and cannot be operator altered.
These are referred to as view only parameters. In the parameters sections of this
instruction manual, view only parameters are identified by a "(V)" beside the Parameter
Number.
Some Parameter Values must be common for all Point Numbers. These are referred to as
global parameters. When a global parameter is accessed, the Point Number display
automatically switches to Point Number 00, and returns to the Point Number previously
selected when a non-global parameter is accessed. In the parameters sections of this
manual, global parameters are identified by a "(G)" beside the Parameter Number.

Programming Security

All operator programming is retained in non-volatile memory, immune to power
interruptions. When programming is complete, the programmer may be removed and
locked away to prevent inadvertent programming alteration. The Lock (P000) parameter
may also be used.
Security Parameter
P000 (G) LOCK
Use this feature (if desired) to secure all programming from inadvertent
alteration.
Direct access (cannot be scroll accessed) this parameter after all program-
ming is complete and enter any value (other than 1954) to activate the pro-
gramming Lock.
When Lock is activated, the SITRANS LU10 may be switched from the RUN
mode to PROGRAM mode and the value of any parameter may be viewed
but not altered. To unLock, direct access this parameter and enter the value
"1954".
This parameter cannot be reset by pressing
values:
Page 18
1954 = off (Parameter Value alteration permitted)
other = activated (programming secured)
SITRANS LU10 – INSTRUCTION MANUAL 7ML19985AN02