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7.2
Preparation for rotary actuators
.
Note
Especially important: Switch the transmission ratio switch (item 7, Leaflet "Operation -- a concise
overview") in the positioner to position 90° (usual adjustment angle for rotary actuators).
1.
Mount the positioner with the appropriate extension kit (see Chapter 3.3, page 8).
2.
Connect the actuator and positioner with the pneumatic tubing and supply instrument quality air to the
positioner (see Figure 13, page 60).
3.
Connect a suitable current or voltage source (see Figures 5 and 6 or Figure 9 for PROFIBUS PA).
.
Note
Before supplying the positioner with electrical energy, screw down the cover and close the safety
catch.
4.
The positioner is now in "P manual" mode. On the upper line of the display, the current potentiometer
voltage (P) is displayed as a percentage, e.g. "P12.3", and on the lower line "NOINIT" is blinking:
5.
Check that the mechanism is now able to move freely over the entire range by moving the actuator into
each end position with the
Tip: You can move the actuator quickly by pressing the other direction key while you hold the first direc-
tion key down.
6.
The display of the potentiometer voltage in % (upper line of the display) must always remain in the range
P5.0 to P95.0. If this is not the case, adjust the friction clutch on the exterior of the housing with a small
hex wrench as follows: Move the actuator into its end position by pressing the
key. Adjust the friction clutch until the upper display line displays a value between P90.0 and P95.0.
7.
Move through the entire range by adjusting the actuator with the
end position. The potentiometer voltage should now remain in the range P5.0 to P95.0. If this is still not
the case, adjust the friction clutch as follows: Move the actuator into its end position again by pressing
the
key.
This time, adjust the friction clutch until the upper line of the display shows a value between P5.0 and
P10.0.
7.2.1
Initialization of rotary actuators
If you can move the actuator correctly, leave it in a central position, and start automatic initialization:
1.
Press the mode key
Display:
2.
Set the parameter to "turn" with the key
Display:
3.
Switch to the second parameter by pressing the mode key
The second parameter is automatically set at 90°.
Display:
C79000-M7474-C157-01
and
keys.
for more than 5 s. This takes you into Configuration mode.
.
and
keys and move it into the
briefly.
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