user manual

22 – 1
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153
Section 22 • User Access
Overview
The user access screen is where all operators go to log
in. In the Vission 20/20, each screen has a security level,
whereby allowing operators, technicians and/or supervi-
sors the ability to modify different sets of setpoints. The
Vission 20/20 has four levels of security, see Figure 22-1.
User Access Screen - Login.
• Level 0 – This is the default level with no operator
logged in. The function available to the operator are
very limited and basically only allows someone to
start and stop the compressor.
• Level 1 – This is a technician level of access. All the
setpoints needed to operate and adjust the perfor-
mance of the compressor will be available to an op-
erator with this level of access.
• Level 2 – This is a supervisor level of access. Setpoints
that require a higher level of knowledge such as
calibrating instrument will be available to an opera-
tor with this level of access.
• Level 3 – This is considered a contractor level of ac-
cess. The setpoints available at this level have the
most potential of causing damage to the compressor.
Therefore, this access is restricted to those only with
the highest level of competence.
The user access screen is also where new operators are
added, changed or removed. Any operator can add an
additional operator but can only add an operator of less-
er or equal security level.
Apply
When selected, applies the user name and password
for security evaluation. If the User name and password
matches an existing user then the operators name will
be applied to the lower status bar and the operator will
be given access to screens of equal security level.
Figure 22-1. User Access Screen - Login