Udc Controllers; Udc Controller Status; Stack Temperature Controller; Udc Controller Setup - Honeywell S7999B Manual

The user is asked to confirm setting the control accuracy to a
new value (Fig. 84). The Fuel/Air Ratio Control is reset during
this setting change.
Fig. 84. Confirm Setting—Control Accuracy.

UDC CONTROLLERS

For Switchable mode, the UDC controllers must be manually
assigned to their appropriate burner/boiler system. This
assignment is done on the Controller Setup page (Fig. 85).
This setup page is reached from the "Controllers" button on
the Setup page (see Display Setup and Diagnosis).
Fig. 85. UDC Controller Setup.
For Local mode, the UDC controllers are automatically
assigned, so setup on this page isn't necessary. The Setup
page can be used to view which UDC controllers have been
assigned, and to manually assign any future UDC controllers
expected to be installed. The "Refresh" button also provides a
quick search to locate any new UDC controllers that haven't
been detected yet. For more setup options for UDC
controllers, see the Display Setup and Diagnostics section.

UDC Controller Status

The Home page contains button icons representing the
different UDC controllers (see Fig. 17) in the burner/boiler
system. Selecting one of these buttons displays a status page
similar to the following figure (Fig. 86) providing status and
control options for the selected controller.
The name of the burner/boiler system may optionally be
displayed in the title at the top of the page. The second line in
the title lists application type of the UDC controller.
Fig. 86. Stack Temperature Controller.
The current input reading of the UDC controller is displayed in
the center of the page along with a bar graph showing the
range of the input sensor and the position of the reading in
that range. On each side of the input may be zero, one, or two
alarm indicators, depending on application type and UDC
configuration, to show whether any alarms exist (LED flashes
red) or not (LED is green). If the alarm is turned off for this
configuration, the alarm text and LED are grayed out. The
alarm setpoints can be adjusted with the Up Arrow and Down
Arrow buttons to increase or decrease the setting. Below each
alarm and input reading are Key buttons that allow the
corresponding status to be selected as a key variable for
display on the Home page. Pressing the Key button changes
the color to yellow, indicating that this status is now a key
variable. Pressing the Key button again deactivates it as a key
variable. Only one Key button can be selected at a time,
because only one key variable status can be displayed on the
Home page for each UDC controller.
Local S7999B ONLY
If the UDC controller can have its setpoint adjusted by the
S7999B, and an alarm is configured, the user must enter a the
S7999B System password to adjust the setpoint. The
password is entered when the setpoint is adjusted for the first
time on the UDC controller status page. The same S7999B
System password is used for all UDC controllers on the Local
burner/boiler system. When the user leaves the status page,
the password expires, and must be re-entered to adjust the
setpoint. The initial password is "s7999b". The password can
be changed on the User Preferences page.
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S7999B SYSTEM DISPLAY
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