20 DataFlo Digital Electronic Remote Controller DRC17 WCAIM2058
Parameter Display Definition
Power-On Position Pon Posn Position the shaft will be driven to when power is first applied. A value of NONE will
hold the current shaft position. The position specified will be held for the time
specified in the Pon Time parameter.
Power-On Position Time Pon Time Time to hold the valve position specified by the Pon Posn parameter. A time value of
0 will bypass the power-on position feature.
Lower Shaft Limit LoPosLim Lowest position percentage the shaft can move to while controlling.
Upper Shaft Limit HiPosLim Highest position percentage the shaft can move to while controlling.
Brake Time Brk Time Amount of time the brake is applied to stop motor movement.
Cycle Count Cy Count The count of the number of complete valve cycles.
Upper Shaft Alarm Limit HiPosAlr Shaft position above which an alarm condition will be issued.
Lower Shaft Alarm Limit LoPosAlr Shaft position below which an alarm condition will be issued.
DRC Communications Rate Com Rate The serial communications rate on the DRC bus
Process Lower Engineering Units PrLo Eng Lower range value for the process transducer being used.
Process Upper Engineering Units PrHi Eng Upper range value for the process transducer being used.
Setpoint Lower Engineering Units SpLo Eng This is the lowest setpoint value. It must be within the limits of the process range.
Setpoint Upper Engineering Units SpHi Eng This is the highest setpoint value. It must be within the limits of the process range.
Default Parameters Dflt Val This variable allows the operator to set all parameters to their factory default values.
See paragraph 4.6.3 for more details.
Flow Control
Worcester Actuation Systems
4.7 Manual Setpoint Mode
Manual Setpoint Mode is used to override the electrical setpoint
input signal and establish a new setpoint. The mode is useful in
testing the controller at various setpoints without having external
equipment generate them. When the manual setpoint is set, it
will remain in effect until disabled or changed by an operator.
The setpoint state will be preserved even if power is removed.
So if the DRC is operating with a manual setpoint and power is
removed and reapplied, it will continue to control using the
manual setpoint.
4.7.1 Entering the Manual Setpoint Mode
In the Run Mode, press either the key or the key
until the mode display appears.
Press ENT to edit the value. It will start blinking the
current mode.
Press either or until MSET is visible.
With MSET blinking, press the ENT key to change to the
Manual Setpoint Mode.
If the security code is zero, no security code is needed to
enter the mode.
Otherwise, when prompted for the security code, press
ENT.
Press and to enter the correct security code then
press ENT to enter the mode.
If the incorrect security code is entered, the Manual
Setpoint Mode cannot be entered.
The Manual Setpoint Mode is exited by pressing the
key to return to the Run Mode.
4.7.2 Enabling, Disabling, and Changing the Setpoint
When the mode is entered, the display will alternate
between Man Setp and the setpoint value. If the manual
setpoint is disabled, the display will show Disabled as the
value.
To disable manual setpoint, simultaneously press both the
and keys while the display is alternating Man Setp
and the setpoint value. The display will then indicate
Disabled as a value.
To enable manual setpoint or to change the value, press
ENT while the display is alternating Man Setp and the
setpoint value. The current setpoint value will begin
blinking. Press the and keys to change the setpoint
to the desired value. Note that the setpoint can only be
set in the range of the lower and upper setpoint values
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