Service manual

22 – 4
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Section 22 • User Access
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
VNC Account Level 3
VNC Account
Vission 20/20 panels can be accessed remotely by using
a VNC client over TCP/IP network. This tab allows the
operator to change default VNC Password and VNC Port
number, see Figure 22-3.
Change VNC Password
New Password:
• The operator will add the password by touching the
entry box and typing the password via the pop-up
keyboard.
Verify New Password:
• The operator will re-enter the password by touching
the entry box and typing the password via the pop-
up keyboard.
Update:
• Pressing this button will initiate the modifi cation of
the VNC account.
Change VNC Port Number
Port Number:
• The operator will change the port number for VNC
server by touching the entry box and typing via the
pop-up keyboard. Default port number is 5900.
Operator can assign port number ranging between
5900 to 6000.
Update:
• Pressing this button will initiate the modifi cation of
the specifi ed VNC account Port number.
Screen Security Levels
The following table lists all screen and their base secu-
rity levels, see Table 22-1. The majority of the screens
have more than one security level. The base security lev-
el gives the user access to the setpoints that can change
to performance of the compressor. The secondary se-
curity level is typically level 3 and is reserved for those
setpoints that require great care and knowledge of the
system in order to change safely.