Programming for faults:
Behaviour
on loss of input signal E1 and / or
on loss of feedback signal E2
.
Pre-condition: Signals 4 - 20 mA
Before commencing the positioner adjustment it must be
ensured that the limit and torque switching of the actuator
(clauses 8-10) as well as the feedback (clauses 12 and 13)
have been set.
15.4 Positioner adjustment
end position CLOSED
.
Set selector switch (local controls) to position I (LOCAL).
.
Run multi-turn actuator by depressing push-button
to end position
CLOSED.
.
Connect input signal E1(nominal value) (0 or 4 mA).
Missing signal E1 and / or E2 is indicated by LED E1/E2 < 4 mA
(figures T1+T2 / V37).
.
To measure the nominal value E1 connect Voltmeter (0 - 5 V) to the
measuring points M1 and M2 (figure T1, page 22).
For E1 (nominal value) = 0 mA: measure 0 V.
For E1 (nominal value) = 4 mA: measure 1 V.
.
To measure the actual value E2 connect voltmeter to measuring points
M3 and M4.
For E2 (actual value) = 4 mA: measure 1 V.
If measured value is not correct: Perform feedback adjustment according
to page 14 clause 12, or page 15 clause 13.
.
Set potentiometer R35 (
∆
E) and R31 (sens) to minimal value by turning
counter-clockwise.
Process related (desired)
behaviour:
Programming:
(Figure T1, page 22)
fail as is, i.e. actuator stops imme-
diately and remains at this position.
fail close, i.e. actuator drives valve
to position CLOSED.
fail open, i.e. actuator drives valve
to position OPEN.
21
Multi-turn actuators SARV 07.1 - SARV 10.1
Operation instructions
AUMA VARIOMATIC
If
Possible LED indications:
(refer to figures T1 and T2)
Then
Required setting in end position CLOSED:
(refer to figures T1 and T2)
LEDs are not illuminated
Turn potentiometer “0” (R25) slightly clockwise until
LED
(V23 yellow) lights up
LED
(V24 green) is
illuminated
Turn potentiometer “0” (R25) slightly clockwise until
LED
(V24) goes out and LED
(V23 yellow) lights up
LED
(V23 yellow) is
illuminated
Turn potentiometer “0” (R25) counter-clockwise until LED
(V23) goes out.
Then turn potentiometer “0" (R25) slightly clockwise until LED
(V 23 gelb) lights up again.
