Interface Conventions - York YD Series Operation Manual

SECTION 2 – OPTIVIEW CONTROL CENTER
Overview
The new graphical display on each control panel al-
lows a wide variety of information to be presented to
the user. Each screen description in this document will
begin with a section entitled Overview which will de-
scribe the graphical elements on the screen and give
a short summary of the functions available. Each ele-
ment on the screen will then be categorized into three
distinct groups: Display Only, Programmable, and
Navigation. Below is a short description of what types
of information are included in these groups.
The Programmable values and Navigation commands
are also subject to access level restrictions as described
below. For each of these elements, an indication is
given to show the minimum access level required to
program the value or navigate to the sub-screen.
Display Only
Values in this group are read-only parameters of in-
formation about the chiller operation. This type of in-
formation may be represented by a numerical value, a
text string, or an LED image. For numerical values, if
the monitored parameter is above the normal operat-
ing range, the high limit value will be displayed along
with the '>' symbol; if it is below the normal operating
range, the low limit value will be displayed along with
the '<' symbol. In some cases, the value may be ren-
dered invalid by other conditions and the display will
use X's to indicate this.
Programmable
Values in this group are available for change by the
user. In order to program any setpoints on the system,
the user must first be logged in with the appropriate ac-
cess level. Each of the programmable values requires
a specific Access Level which will be indicated beside
the specified value. All of the programmable controls
in the system fall into one of the categories described
below:
Access Level
In order to program any setpoints on the system, the
user must first login with an appropriate access level.
When power is applied to the chiller, the system begins
with an Access Level of VIEW. This will allow the
user to navigate to most screens and observe the val-
ues displayed there. However, the user will not be al-
26

INTERFACE CONVENTIONS

lowed to change any values. To change any values, the
user must return to the Home Screen (shown by de-
fault when power is applied to the system), and use the
LOGIN button or utilize the CHANGE SETPOINTS
key described below. At this point, the user will be
prompted to enter a User ID and the corresponding
Password. By default, the User ID is zero (0). In order
to gain standard OPERATOR level access, the Pass-
word would be entered as 9 6 7 5, using the numeric
keypad. OPERATOR access reverts to the VIEW lev-
el after 10 continuous minutes without a keypress. If a
custom User ID and Password have been defined (see
User Screen), the user may enter that User ID and the
corresponding Password value.
If the correct password is received, the user is autho-
rized with the appropriate Access Level. If an incorrect
password is entered, the user is notified of the failure
and prompted again. At this point the user may retry
the password entry, or cancel the login attempt.
Change Setpoints
On screens containing setpoints programmable at the
OPERATOR access level, a key with this label will be
visible if the present access level is VIEW. This key
brings up the Access Level prompt described above. It
allows the user to login at a higher Access Level with-
out returning to the Home Screen. After login, the user
may then modify setpoints on that screen.
Setpoints
The control center uses the setpoint values to control
the chiller and other devices connected to the chiller
system. Setpoints can fall into several categories. They
could be numeric values (such as 45.0°F for the Leav-
ing Chilled Liquid Temperature), or they could Enable
or Disable a feature or function.
Regardless of which setpoint is being programmed, the
following procedure applies:
1. Press the desired setpoint key. A dialog box ap-
pears displaying the present value, the upper and
lower limits of the programmable range, and the
default value.
2. If the dialog box begins with the word "ENTER",
FORM 160.69-O1
ISSUE DATE: 9/30/2012
JOHNSON CONTROLS