S7999D1048 COMBUSTION SYSTEM OPERATOR INTERFACE DISPLAY
65-0321—01 44
Fig. 98. Actuator Diagnostics—in degrees.
Fig. 99. Actuator Diagnostics—in A/D counts.
The button on the bottom of the screen toggles the user
between the formats to display the data in.
Set Control Accuracy
The “Control Accuracy” button, if enabled, allows the user to
view the current control accuracy setting and change it, if
desired.
This feature is only available for Fuel/Air Control software
builds higher than 178. The Fuel/Air Control must be updated
to use this feature. The “Control Accuracy” button on the
Actuator screen is grayed-out when the Fuel/Air Control
software build is 178 or below (see Fuel/Air Ratio Control
Configuration page for build number).
The control accuracy setting controls how closely the actuators
follow the profile curve configured in a Fuel/Air Control and
defines the allowable tolerance for achieving each commanded
position. The R7999 system normally drives the actuators to
within 0.1 degree (default value) of the programmed curve, but
many applications may not require this type of accuracy.
Increasing the control accuracy value may reduce the amount
of actuator dither/hunting and premature wearout due to a
noisy environment or a potentiometer.
When the “Control Accuracy” button is selected, a new page
(Fig. 100) is displayed. Pressing the Set Accuracy button
causes the Fuel/Air Control to reset and store the user-
selected value in the Fuel/Air Control nonvolatile memory.
NOTE: Setting the control accuracy to a value other than
0.1 degree disables the 0.1 degree positioning
command option when commissioning the curve.
This setting applies to all actuators, not just the
actuator that has its status displayed.
Fig. 100. Set Control Accuracy.
The user is asked to confirm setting the control accuracy to a
new value (Fig. 101). The Fuel/Air Ratio Control is reset during
this setting change.
Fig. 101. Confirm Setting—Control Accuracy.
UDC CONTROLLERS
UDC controllers must be manually assigned to their
appropriate burner/boiler system. This assignment is done on
the UDC Controllers page (Fig. 102). This setup page is
reached from the “UDC Controller” button on the Control Setup
page (see “Setting up the S7999D display” on page 15).
To Next Page
Loading...
