JUMO B70.1170.0, Operating Manual

Page: 82 / 118

7 Configuration level 21 2011-03-13
During the differential value calculation, the measured value INP, IN2 and the set differential value ALD are evaluated.
The relay output K1 is active and the OK LED is lit green as long as the system is within the valid range.
If the system leaves the valid range the relay output K1 switches off and the K1 LED is lit red.
Analog input Remark
Setting range for AL:
(can be restricted via
the set-up) Limits for
underrange /
overrange
-200°C
300°C
AL = 150°C (inverse)
0°C
200°C
100°C
-100°C
300°C 200°C 100°C 0°C -100°C -200°C
ALD = 50°C
IN2
INP
valid
range
valid
range
Hys1
Hys1
All difference values diF = INP-IN2 are shown in the picture.
Inside the valid range (green) all values are smaller than the
setting for the difference ALd = 50.
INP = 101°C, IN2 = 50°C
101 - 50 = 51 exceeds Ald = 50 and lies out of the valid range.
INP = 50°C, IN2 = 50°C
50 - 50 = 0 and lies inside the valid range.
Example 1:
Example 2:
The area between the dot and dash lines indicate
the span of the hysteresis (factory setting: 1K)
he inputs INP and IN2 are additionally monitored
in regards to the limit value AL=150°C
T
50°C
1
2
v
Change-over to absolute
value measurement:
Chapter 12 „Setup program“