ABB PositionMaster EDP300 Operating Instruction page 34

SETPOINT
... / ... / SETPOINT
Menu / Parameter Value range
SP Range Min. 4.0 ... 18.4 mA
SP Range Max. 5.6 ... 20.0 mA
SP Filter 0 ... 120 seconds
SP Ramp Up OFF ... 0 ... 200 seconds
SP Ramp Down OFF ... 0 ... 200 seconds
SP Charact. Curve LINEAR linear
1:25
1:50
25:1
50:1
Custom
SP Direction Direct
Reverse
34 OI/EDP300-EN | PositionMaster EDP300
Description
The setpoint range is the input current range as a percentage of the working range for the valves
and fittings (from 0 ... 100 %).
Use parameter "0" to specify the lower limit of the setpoint range.
IMPORTANT (NOTE)
The configured setpoint range must not be smaller than 20 % (3.2 mA).
The setpoint range is the input current range as a percentage of the working range for the valves
and fittings (from 0 ... 100 %).
Use parameter "100" to specify the upper limit of the setpoint range.
IMPORTANT (NOTE)
The configured setpoint range must not be smaller than 20 % (3.2 mA).
Use this parameter to set a damping value for the setpoint signal.
Here the stroke time for the actuator can be increased.
A setpoint change is not directly transferred to the positioner; instead, the speed is reduced
accordingly.
CAUTION – Risk of crushing!
In manual mode, with an active safety position and after errors, the "Setpoint
ramp" function is disabled.
The actuator will therefore move without delay.
Do not reach into the adjustment mechanism.
Here the stroke time for the actuator can be increased.
A setpoint change is not directly transferred to the positioner; instead, the speed is reduced
accordingly.
CAUTION – Risk of crushing!
In manual mode, with an active safety position and after errors, the "Setpoint
ramp" function is disabled.
The actuator will therefore move without delay.
Do not reach into the adjustment mechanism.
Use this parameter to select a function that adjusts the behavior of the positioner to the analog
input signal in accordance with a predefined course. This linearizes the characteristic curves for
the valves and fittings and improves the behavior of the overall control loop.
In addition to five predefined characteristic curves, you can also select a user-configurable
characteristic curve, which can only be generated and saved in the device via a PC with the
appropriate configuration program (and not locally).
The action describes the relationship between the analog setpoint and pneumatic output 1.
Direct: Rising, setpoint 0 ... 100 % -> output 0 ... 100 %
Reverse: Falling, setpoint 0 ... 100 % -> output 100 ... 0 %