Section 8:
LCD Contrast Adjustment
Page 23
If the correct lock code is entered then access to the field is granted. Once the field is exited the lock is reset so
that re-entry into the field will require re-entry of the lock code.
Locks are generally used so that only authorized personnel can make changes to Drive variables. If an operator is
required to modify a number of variable, or modify a single variable often then being required to re-enter the lock
code each time can become a burden.
The 2800 allows a global override to be activated on an individual lock code basis. Access to the global override
feature is gained by pressing the
Lock
key on the 2800.
When the
Lock
key is pressed
this screen will be displayed.
The operator can enter the four character lock code. Like the field lock, blind entry is used. Assuming a valid lock
code is entered and override has not been previously activated, the following screen will display:
If the
Enter
key is pressed the override will be applied, the previously triggered screen(s) will reappear. The
operator can now access any field that uses that particular lock code in any screen without being required to enter
the lock code. The override will remain activated until the unit is restarted through either re-powering or recovery
from a fatal error. The operator may also deactivate the override by pressing the
Lock
key, then entering the lock
code which will cause the following screen to be displayed:
Summary:
!
Fifteen lock codes are assignable using ScreenMaker 2000K. The lock code window is accessed via the
path: Setup
º
OIT
º
Lock Data. A lock code is comprised of four characters. The characters zero through
nine, the minus sign, and the decimal point are valid characters and may be used in any combination. A
lock code having four zero characters will disable the lock.
These are all valid lock codes: 1234 -9.3 8.-. -1-2
!
A lock code may be assigned to any of the following field types: Drive Data Field, Data Set Field,
Bit Status Field, Multi-State Indicator Field, and Recipe Field.
!
A global override may be applied to individual lock codes using the
Lock
key on the 2800.
All Liquid Crystal Display products require contrast adjustment if operated over a wide temperature range. The
**GLOBAL SECURITY***
ENTER LOCKCODE: _
Cancel = EXIT
GLOBAL LOCK OVERRIDE
IS: -–DEACTIVATED--
Enter = ACTIVATE
Cancel = EXIT
GLOBAL LOCK OVERRIDE
IS: -–ACTIVATED--
Enter = DEACTIVATE
Cancel = EXIT
PM2800U3K Revision 4
