SMC Networks IP8101 Series User Manual

No.DIG-31900-OM002
32
(400) Zero point / span setting
The zero point / span setting can be selected by setting ON or
OFF. The default when shipped is OFF. If ON is selected, the
lower limit (410) (stroke range between -20.0 and 60.0%) and the
upper limit (420) (stroke range between 40.0 to 120.0%) can be
set. The default value when shipped is (410) = 0.0%, and (420) =
100.0%. However, the lower limit (410) and the upper limit (420)
setting cannot be established unless the following is satisfied.
Span to be set : “(420) - (410)” ≧ 60.0 %
Example with 400=ON, 410= 10.0, and 420= 90.0 when (200)=dir
is selected:
100%
(20mA)
0%
(4mA)
0%
100%
Stroke
Input current
10%
90%
400=on
400=oFF
Fig. 26
When this zero point / span setting is conducted, a position value
(P value) is shown with determination of the set span as 0-100%.
With the settings of (400) = ON, (410) = 0.0, and (420) = 66.6, it is
reflected to each item as shown on Table 11.
Table 11
Operation
direction
Input
current
Input
value
(S value)
Position
value
(P value)
Actuator
opening
＊5
Analog
output
(mADC)
(%)
(%)
(degree)
(mADC)
Direct
(dir)
4-20
0-100
0-100
0-60
4-20
Reverse
(rvS)
4-20
0-100
100-0
60-0
20-4
4: The actuator opening of 90 degrees is taken as an example here.

SMC Networks IP8101 Series Specifications

General

Brand	SMC Networks
Model	IP8101 Series
Category	Valve Positioners
Language	English