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6.14 PV1 Offset
For some applications it is desirable to adjust the ACTUAL process value in the con-
troller display with an offset to the real process value. For this purpose, the SHIF
function can be entered as a correction value for PV1 in the UREG200. The set va-
lue, positive or negative, is added to the current value. The SHIF function is only
available for PV1.
Example:
A process consists of a heater, a sensor and an object to be heated. In the process,
the sensor cannot be placed directly on the object, so that there is a measurement
difference of e.g. 35°C between sensor temperature and real object temperature. The
object should be heated to 200°C, but only has 165°C real. The controller must now
be set to 235°C setpoint. However, a correction of the measured value can be en-
tered via the SHIF function, in the example SHIF = -35°C. The value displayed in the
controller is now 200°C, like the real temperature of the object.
SHIF / PV1-Offset
35°C Temperature
SHIF will be discontinued
Display is correct difference
is stated,
SHIF = -35°C
SHIF = -35°C
SHIF = 0
Provides more heat
PV = SV
