VEGA VEGASON 71 - 1 … 75 - 1 - Manual (Page 48)

Supplementary optimizations
48 71 - 1 … 75 - 1
Fault signal MODE 1 - 24
The fault signal is triggered when the reliability
cannot be guaranteed. The reliability is calculated
from the ratio between echo measurement to noise
level measurement.
The fault signal can be modified as follows:
Explanation in case of failure
Fault signal off = 0 (factory preset):
-
no fault signal is indicated
- the last correctly detected measured value is
stored
- with the detection of new correct echo, the last
stored value is cancelled and the actual one indi-
cated.
The relay and current outputs react in both cases
acc. to their channel coordinations and to the failure
actions adjusted in mode 0 - 93.
Fault signal on = 1:
-
no fault signal is indicated
- fail safe relay de-energizes
- the failure LED of the concerned channel lights
- with the correction of a new correct echo, the
feeding phase is automatically started and after
it is finished, an actual measured value is indi-
cated.
Programming example
for fault signal on ...................................................... • select mode 1 - 24 in MODEFIELD
• program fault signal on 1 in PARAMETER FIELD
• then store with STO-button
Measuring window MODE 1 - 23
The measuring window must be switched off to
achieve reliable measuring results in case of level
changes > 10 cm / sec. or fluctuating level
changes. Attention:
When switching off the measuring window always
the first large echo is detected within the working
range.
Programming example .......................................... • select mode 1 - 23 in MODEFIELD
• program measuring window off 0 in
PARAMETER FIELD
• then store with STO-button
Any learn cycle already activated in mode 17 is not
used, however its data is not lost.