AUMA SA 07.1 - SA 30.1 - Positioner in Split Range Version (Option); Split Range: Description of Functions; Programming for Split Range Operation; Positioner Adjustment for Split Range

21.8 Positioner in Split Range version (option)
For Split Range, a modified version of the positioner is used. The standard
version is not suitable for Split Range operation.
Split Range operation is only possible with the position transmitter RWG.
21.8.1 Split Range: description of functions
In Split Range operation, a setpoint is shared by up to four positioners. A
typical example is a pipeline with a bypass. The actuator mounted on the
bypass reacts in the lower range (0 – 10 mA), the actuator on the main
valve in the upper range (10 – 20 mA). Other values such as 4 – 12 mA and
12 – 20 mA can also be set.
21.8.2 Programming
DIP 5 at code switch S1-7 must always be in position ON for Split Range
version.
The further programming of the positioner via the code switch S2-7 can be
made in the same way as during normal operation.
21.8.3 Positioner adjustment for Split Range (see also example further down the page)
.
Supply the specified minimum command signal (nominal value E1) for the
positioner and check by measuring with voltmeter at the measuring points
MP3 and MP4 (figure 53).
.
Connect voltmeter between measuring point M3 and measuring point MP1.
Calculate setting value:
Initial value=E1
min
[in Ampere] x 250 Ohm
Set initial value with potentiometer P5.
.
Supply specified maximum command signal (nominal value E1) and check
by measuring at the measuring points MP3 and MP4.
.
Connect voltmeter between measuring point M9 and measuring point MP1.
Set potentiometer P6 to 5 V.
.
Supply input signal E1 from minimum to maximum value and check the set
range 0 – 5 V at measuring point M9. If necessary, readjust with P5 or P6.
.
Apply the same procedure to the second actuator’s positioner and set
according to the specified nominal values E1.
.
After setting the Split Range operation, perform further readjustment as
described on page 38.
43
Multi-turn actuators SA 07.1 – SA 30.1/SAR 07.1 – SAR 30.1
Operation instructions with actuator controls AUMA MATIC AM 01.1/AM 02.1
Programming
Command signal
Setpoint E1
Feedback
1)
Actual value E2
via DIP switch S1-7
(see figure 53)
4 – 12/12 – 20 mA
0 – 10/10 – 20 mA
4 – 20 mA
0 – 20 mA
4 – 12/12 – 20 mA
0 – 10/10 – 20 mA
0 – 5 V
1) Signals for internal feedback:
0/4 – 20 mA from electronic position transmitter
Table 12: Possible settings for Split Range operation