West Control Solutions Pro-EC44 - Manual (Page 238)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 231
Setpoint Upper Limit
The maximum value allowed for setpoints, adjustable within the scaled input limits. The value
should be set below any level that might cause problems in the process. If the value is
moved below the current value of a setpoint, that setpoint will automatically adjust to keep it
within bounds.
Also refer to: Input Span; Scaled Input Upper Limit; Setpoint and Setpoint Lower Limit.
Setpoint Lower Limit
The minimum value allowed for setpoints, adjustable within the scaled input limits. The value
should be set above any level that might cause problems in the process. If the value is
moved above the current value of a setpoint, that setpoint will automatically adjust to keep it
within bounds.
Also refer to: Input Span; Scaled Input Lower Limit; Setpoint and Setpoint Upper Limit.
Setpoint Ramp Rate
Setpoint ramping is used to protect the process from sudden changes in the setpoint, which
would result in a rapid change in the process variable. A rate is set at which the actual
setpoint value ramps towards its target value, when the setpoint value is adjusted or the
active setpoint is changed. The feature can be turned off by set
ting the ramp rate to “OFF”.
To further protect the process, the initial value of the setpoint is made equal to the current
process variable value at power-up, when switching back to automatic from manual control,
from control disabled to enabled or after a sensor break is repaired. The actual setpoint will
rise/fall from this value at the ramp rate set, until it reaches the target setpoint value.
Also refer to: Active Setpoint; Actual Setpoint; Manual Mode; Process Variable; Setpoint and
Setpoint Selection.
Setpoint Selection
The setpoint select parameter in the control sub-menu defines whether the active setpoint
will be the main or alternate setpoint. The choice of setpoint can also be made via a digital
input or an operation mode if the selection screen has been enabled.
Also refer to: Active Setpoint; Display Configuration; Alternate Setpoint; Digital Input; and
Setpoint.
Setup Wizard
A sub-set of the configuration menu parameters chosen to allow easy setup for basic
applications. Users with more complex applications should select the parameters they need
directly from the configuration menus.
The wizard runs automatically at the first ever power-up and exits to operation mode when
completed. The wizard can be run manually from the main menu (requires an unlock code).
An option to reset all parameters to default is offered when manually running the wizard.
Refer to the Setup Wizard information in the Configuration & Use section.
Also refer to: Lock Codes; Configuration Menu; Main Menu; Operation Mode and Reset to
Defaults.