Burkert Type 1067 - Manual (Page 84)

E-32-
POSITIONER 1067 4 OPERATION
DIRECTN (FACTORY SETTING: WPOS = RISE, XPOS = RISE): Sense or direction of action.
By means of the WPOS additional function the sense of action between the input signal and the
setpoint (WPOS). can be set, and also by means of XPOS the assignment of the air supply state of the
actuator A1 to the indicated value (XPOS).
Setting range:
MIN:
0 ... 75 % of the unit signal range,
MAX: 25 ... 100 % of the unit signal range.
The minimum distance between MIN and MAX is 25%.
SPLTRNG (factory setting: MIN = 0%, MAX = 100%): Split range
This additional function enables the set value range of a positioner to be restricted by stipulating a mini-
mum and maximum value. This makes it possible to divide the used unit signal range (0 ... 10 V, 0 ... 20
mA or 4 ... 20 mA) over several positioners (without or with an overlap). In this way, several valves can
be partially used either simultaneously or in sequence as a final controlling element
(Fig. 35).
Fig. 35 Splitting a unit signal range into two set value ranges
Setpoint (mA)
Setpoint range
positioner 1 Setpoint range
positioner 2
Plug travel (%)
Input DIRECTN Setpoint
WPOS
I1 U1
(WPOS)
0/4 mA 0 V RISE 0 %
20 mA 10 V 100 %
0/4 mA 0 V FALL 100 %
20 mA 10 V 0 %
Air supply DIRECTN Measure
State A1 XPOS (XPOS)
Air exhaust RISE 0 %
Air on 100 %
Air exhaust FALL 100 %
Air on 0 %
Fig. 34 Sense of action
0/4 mA Input signal 20 mA
0 V 10 V
air exhaust air on
Air supply state
FALL
RISE
FALL
RISE