valve needs to move through the range from 0 to 100 % without stopping. Its default setting
is optimally tuned in this device and therefore should not be changed (Ty = 24 s).
The
Dead band (P12) determines the reaction to the controlled state, i.e. the actuator is not
active if the controlled variable moves within the dead band.
Parameters
WE
Range of values
P09 – Kp flow temperature control
2.0
0.1 to 50.0
P10 – Tn flow temperature control
120 s
0 to 999 s
P11 – Ty actuator transit time for valve travel
24 s
10 to 240 s
P12 – Dead band (switching range)
2.0 %
0.5 to 5.0 %
6.9
Direction of action
Increasing/increasing
(F03 - 0)
4
Actual value < Set point: Actuator stem retracts
4
Actual value > Set point: Actuator stem extends
Increasing/decreasing
(F03 - 1)
4
Actual value < Set point: Actuator stem extends
4
Actual value > Set point: Actuator stem retracts
Actuator stem extends
For globe valve:
Valve CLOSED
For three-way mixing valve:
Port A -> AB open, port B -> AB closed (see Fig. 13)
For three-way diverting valve: Port AB -> A closed, port AB -> B open
Actuator stem retracts
For globe valve:
Valve OPEN
For three-way mixing valve:
Port A -> AB closed, port B -> AB open (see Fig. 13)
For three-way diverting valve: Port AB -> A open, port AB -> B closed
Function
WE
Configuration
F03 – Direction of stem action
0
F03 - 0: Increasing/increasing
F03 - 1: Increasing/decreasing
EB 5757-7 EN
26
Functions