Operating Manual 90° ACTUSAFE CMF(S)QT
OM-ENGLISH-Failsafe-QT-16xx-V2.00-2022.03.01
7 Parameter menu
7.12
Parameter group: Positioner (optional)
The positioner SR option is used to control the electric actuator by means of a set point input 0/4. . . 20 mA
signal. The SR helps control the position of the actuator, i.e. the positioner ensures that the actual value and thus the
position of the actuator matches the desired set point.
Menu item
Sub-menu item
poss. setting
Notes / comments
P13.1
Positioner
Function
0: Off
Positioner disabled
1: Position
mA input for the position setpoint
2: Pos. valvechar.
mA input for the position setpoint, taking into account the
valve characteristic
P13.2
Positioner
Begin (at 0%)
0. . . 20.5 mA
{4.0 mA}
mA value of the setpoint for the CLOSED (0%) position
P13.3
Positioner
End (at 100%)
0. . . 20.5 mA
{20.0 mA}
mA value of the setpoint for the OPEN (100%) position
P13.4
Positioner
Dead band
0.05. . . 10.0%
{1.0%}
Tolerance range for the control deviation (set point
position – actual position) where no adjustment occurs.
The deadband should not be set too low to prevent
actuator oscillation.
P13.5
Positioner
Gain
1. . . 100%
{100%}
The gain (gradient) affects the positioning close to the
target position. The smaller the gain selected (e.g. 20%),
the earlier the actuator starts reducing its speed in case
of speed variable actuators on approaching the target
position. In case of actuators with fixed speed (reversing
starters), the speed reduction is done by pulsing (also
see params P13.9 and P13.10). This leads to better
positioning (smaller reachable deadband). A 100%
setting disables this gradient.
P13.6
Positioner
Live zero
detect.
0: Ignore
The setpoint monitoring (monitoring the setpoint to below
approximately 2 mA = loss of signal) is disabled.
1: Stop
Actuator stops on signal failure.
2: Open
On signal failure, actuator moves the OPEN position.
3: Close
Actuator moves on signal failure to the CLOSED position.
4: Emerg.pos.
On signal failure, the actuator moves the defined
emergency position (see parameter P13.7).
5: Emerg. Open
Emergency open on signal failure.
6: Emerg. Close
Emergency close on signal failure.
7: Last valid value
Moves to the last valid value after signal failure; relevant
for setpoints over bus. The actuator will move to the 4mA
position, in case of an analog input signal failure.
8: Failsafe
Failsafe-operation on signal failure.
P13.7
Positioner
Emergency
pos.
0. . . 100%
{50,0%}
Determination of the emergency position
(Can also be set in the menu P8.5)
P13.8
Positioner
Calib.Setpoint
20mA
-10% . . . +10%
Calibration value for the 20mA setpoint. 1% = approx.
0.2mA. Calibration process: By applying 20mA on the
setpoint input, this parameter is corrected until the
readout matches 20mA.
P13.9
Positioner
Min. impulse
{0,2 s}
Variable speed actuators (Actusmart CM and Smartcon
CSC FU): Without function
Fixed speed actuators (Smartcon CSC): Minimum
activation time of the reversing contactors. For very small
activation times (<0.3. . . 0.5 s), the motor will be switched
off during start-up process, which significantly increases
mechanical wear on reversing contactors. With frequent
periods of very small activation times (restless loop,
small dead zone, clocking near to the target value), we
therefore recommend electronic reversing contactors.
continued on next page
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