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

 

 

 

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Emerson 20/20 service manual Screen Security Levels, Security Access Levels

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