VEGA VEGASON 71 - 2 … 75 - 2 - Manual (Page 35)

Measurement, Relay output
71 - 2 … 75 - 2 35
By parameter adjustment it is possible to define for
each relay output the tendency determination mode
and to coordinate this relay output to a channel.
The information for tendency determination is
formed of the rate of level change per time unit
(cm / min) and can be taken for raising and lower-
ing tendency.
The adjustment is made in cm / min. and detects a
range of 000.1 … 999.9 cm / min.
Programming example for tendency determination, e.g. 50 cm / min.
Coordination as described on page 31
Mode for relay output 1 ..................................... • select mode 0 - 44 in MODEFIELD
• program figure 3 in PARAMETER FIELD
• then store with STO-button
Tendency determination for relay output 1................ • select mode 0 - 45 in MODEFIELD
• program e.g. 050.0 (cm / min.) in PARAMETER
FIELD
• then store with STO-button
After above programming the relay output reacts as
follows:
with raising rate of level change
≤
50 cm / min.
> 50 cm / min.
Same procedure for relay output 2 … 4, however
with respective modes, see above.
Mode coordination / meaning module relay coordi- mode tendency
output nation
1 1 0 - 43 0 - 44 = 3 or 4 0 - 45
2 0 - 48 0 - 49 = 3 or 4 0 - 50
2 3 0 - 53 0 - 54 = 3 or 4 0 - 55
4 0 - 58 0 - 59 = 3 or 4 0 - 60
Tendency determination
relating to increasing level
example relay output 1
Requirement:
-
enquire mode 3 (parameter 3) in mode 0 - 44
- program the value of the required tendency
determination in mode 0 - 45
Procedure:
-
relay is not operated
- if the level raises quicker than programmed in
mode 0 - 45, the relay energizes
- if the filling speed is the same or lower than the
given value, the relay de-energizes again
11 9
10
11 9
10
Tendency determination