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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153
either select the username from the operators win-
dow or enter the username manually by touching
the entry box and entering the name via the pop-up
keyboard.
Operator Password:
• This entry box is for the operator’s password. The
password can be entered by touching the password
entry box and entering the password via the pop-up
keyboard.
Verify Password:
• This entry box is to verify the operator’s password.
Verifying the password can be entered by touching
the “Verify Password” entry box and entering the
password via the pop-up keyboard.
Security Level:
• Select a security level for the account being added or
modifi ed. Only levels that are equal to or less than the
operator’s own security level will be shown.
Add / Update:
• Pressing this button will initiate the creation or modi-
fi cation of the specifi ed account.
Delete:
• Pressing this button will delete the specifi ed account.
Screen Security Levels
The following table lists all screen and their base secu-
rity levels. The majority of the screens have more than
one security level. The base security level gives the user
access to the setpoints that can change to performance
of the compressor. The secondary security level is typi-
cally level 3 and is reserved for those setpoints that re-
quire great care and knowledge of the system in order
to change safely.
Table 22-1. Security Access Levels
Security Access Levels
Page User Level *Note
Event List Level 0 -
Input/Output S
tates Level 0 -
Trend Chart Level 0 -
Help Level 0 -
Alarms & Trips Level 1* Level 3 required for constraints
Compressor Scheduling Level 1 -
Compressor Sequencing Level 1 -
Condenser Control Level 1* Level 3 required for constraints
Compressor Control Level 1* Level 3 required for constraints
Maintenance Level 1 -
Data Backup Level 1* Level 3 required to upload data
Instrument Calibration Level 2 -
Service Option Level 2 -
Confi guration Level 2* Level 3 required for pages 3 - 6
Slide Calibration Level 2 -
Timers Level 2* Level 3 required for constraints
Section 22 • User Access