Screen Security Levels, Security Access Levels

Section 22 • User Access

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 modiﬁed. 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- ﬁcation of the speciﬁed account.

Delete:

• Pressing this button will delete the speciﬁed 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 States	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	-

Conﬁguration	Level 2*	Level 3 required for pages 3 - 6

Slide Calibration	Level 2	-

Timers	Level 2*	Level 3 required for constraints

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153

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20/20 specifications

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