FISCHER PRO-LINE DE90, Operating Manual

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5 | Operation FISCHER Mess- und Regeltechnik GmbH
80 BA_EN_DE90
5.5.4.3 Signal limits
NOTICE! The limit parameters apply for both output signals.
The output signal can by limited by the limit parameters. This primarily serves to
prevent error messages in downstream systems caused by brief overstepping
of measuring ranges. Due to the fact that the limit parameters for both signal
types working the same way, they are only explained for the current signal as
this point.
The parameters
limit I min.
,
limit I max.
and
I error signal
define the limits of the output signal that may not be undercut or exceeded re-
gardless of the measured variable. These limit values take precedence over the
meas.range C1 start
and
meas.range C1 end
range defined by the
parameter .
(6)
4 mA
20 mA
21.5 mA
Error signal
Error signal
Measuring range C1 start Measuring range C1 end
limit I max.
limit I min.
basic measuring range
output signal
Fig. 115: Limitation of the output signal
The value defined via the parameter
I error signal
is issued if the device
detects an internal error and can no longer work correctly. It should be noted
here that not all potential errors and faults can be detected by the device itself.
Signal range
Current signal 0 … 21.5 mA
Voltage signal 0 … 10.5 V
(6)
For the second channel, the channel number changes to C2.