e
e
N
N
o
o
d
d
3
3
-
-
D
D
D
D
i
i
g
g
i
i
t
t
a
a
l
l
d
d
o
o
s
s
i
i
n
n
g
g
c
c
o
o
n
n
t
t
r
r
o
o
l
l
l
l
e
e
r
r
e
Nod3-
D
: User’s instructions
165 752-A
20/23
∗
else the cycle is suspended until a new request of starting the cycle that causes the cycle to
continue from its last step.
11.3.3 Stop cycle
This edge-active input causes the feeding cycle to be stopped inhibiting the different outputs involved.
12 DOSING BY UNLOADING FUNCTIONING MODE :
The dosing by unloading functioning mode is a way to monitor a dosing cycle of a product by measuring
the weight in loss from a tank equiped with a load cell. In this functioning mode, the dosing process is
entirely managed by
e
Nod3-
D
and especially thanks to its four digital outputs allowing to monitor the
different phases of the cycle and to indicate errors.
Fig. 8 and 9 shown below represent graphically how a dosing by unloading cycle is working and what is
the influence of the variables involved.
Measure
reloading max. level
Time
Fig. 8 : dosing by unloading cycle with reloading phase at the end of the cycle
coarse feed
fine feed
cycle in progress
reloading
dosing result available
start cycle
1
6
4
2
2
5
target weight
(target weight – fine feed level))
(target weight – inflight weight)
reloading min. level
reference weight
3
dosing result
7
