Service manual

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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Appendix B • Vission 20/20 Application Procedures
User Access Menu
This menu allows the operator to assign user accounts. The 20/20 will be shipped with a Level 3 operator and pass-
word pre-assigned to the installing contractor. He can then assign all users with security levels as needed.
The procedure to assign user access levels is to fi rst press the User Access button. The User Access screen will appear
with the preassigned level 3 operator name visible within the Operators section. Highlight the name, then enter the
password associated with that name of the user, then press Enter key to close the keyboard. Then press “Apply” but-
ton. Press the “Manage Accounts” tab to begin the process of entering another Operator name, and assigning pass-
word and user level of this additional user. Last – remember to press the Add/Update button to add this user to the list,
then press the “Apply” button before exiting the Logon screen to make this change permanent.
Use the information below to determine the user level assignments.
Actions Note
Level 0 elementary control. No password associated with this level.
(Allowed to view all screens that are enabled.)
Level 1 operator level low level user
Level 2 operator level advanced user
Level 3 full access supervisor
Level 0 user level (no login required) has the ability to start and stop the compressor and change the operating set-
point within the minimum and maximum settings defi ned by the supervisor. He can not change any alarm and trip
setpoints or timer setpoints.
Page User Level Note
Event list level 0 View
Input/output states level 0 View/create freeze screen
Trend chart level 0 View/operate
Slide calibration level 3
Instrument calibration level 2
Service options level 2
Condenser control level 1 Setpoints can be modifi ed / set at Level 1
Compressor sequencing level 1 Setpoints can be modifi ed / set at Level 1
Compressor scheduling level 2
Timer
Setpoints (page 1) level 2
Setpoints (page 2) level 2
Constraints level 3
Alarms trips
Setpoints level 2
Constraints level 3
Delay level 3