Access To Legal−For−Trade Data - HBM WE2108 Serie Referenzhandbuch

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2.4
Legal−for−trade data (e.g. the nominal load and weight unit of the scale) as well as the cali-
bration are protected by a password in order to prevent inadvertent overwriting. The corre-
sponding commands are executed only after previous password entry through the command
SPW. Otherwise they are answered with "?CRLF". An arbitrary password is determined and
stored in the EEPROM with the command DPW. The access is enabled with entry of the last
determined password (command SPW"password";).
It is disabled again:
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The password can be set anew at any time without knowledge of the previous password.
Therefore the password protection acts only against inadvertent overwriting of parameters,
but not against misuse. However, every change of a legal−for−trade−parameter is detectable
by the status of the calibration counter:
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In legal−for−trade mode, each of the following commands increments the counter:
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After configuration of a scale, the counter is therefore incremented by several steps. If this is
not wanted, this order should be complied with:
The counter is then incremented by 2.
NOTE
The WE2108 offers the possibility of blocking all parameter changes by a control input
(e.g. with a key switch). In this case the password entries also remain without effect.
Set the parameter F_InP to set up the block (see Reference Manual Section 6.3 and
4.2, "Menu operation").
HBM
Access to legal−for−trade data
on entry of a wrong password
on entry of SPW without parameter
on entry of DPW, also with unchanged password
after reset
after switching the unit off
after interruption of the power supply
If legal−for−trade mode is set (i.e. parameter "trade" = 1 (OIML) or 2 (NTEP)), each
change of a legal−for−trade−parameter results in an increment of the counter. This
process cannot be prevented by the user.
The counter reading can be read in the inFo menu ("Chec" parameter) or by the query
TDD?; .
In the industrial mode ("Trade" = 0), the calibration counter remains unchanged.
Switching over from industrial mode to legal−for−trade and vice versa also increments
the calibration counter.
TDD1, if the password is set
Commands which automatically store legal−for−trade data (e.g. LWT)
Switch off legal−for−trade mode
Perform parameter changes
Activate legal−for−trade mode
Scale electronic unit (NSW)
WE2108