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
23/23
12.2.7 Target weight and inflight weight
The ‘fine feed’ ddisabling occurs when the gross measurement decreasing is superior to the (target
weight – inflight level) level. The inflight weight value allows therefore to quantify the weight of product
that carries on falling after the output inhibition and so to avoid a systematic overoload.
This value can be automatically adjusted, the correction amplitude is affected by a percentage that can be
configured. It is also possible to have a stronger correction (x 3) as the result is outside the fixed
tolerances (cf. §12.29).
(
↔
reference weight – gross measurement
≥
(target weight – inflight level))
12.2.8 Final stabilization time
This timer corresponds to the minimal necessary duration for the stabilization of the weight before the
determination of the result and the control of tolerances.
When it is over, the ‘motion time out’ timer begins. If the stability can not be found within this duration, the
dosing result compared to the tolerances is equal to the last gross measurement value.
12.2.9 Tolerances
The dosing result is compared to 2 limit values in order to check that it is included within an acceptable
range.
∗
a high tolerance (tolérance +) or tolerance in excess :
if the difference |(target weight – dosing result) > tolérance + |
where (target weight – dosing result) < 0, the ‘out of tolerances’ and ‘dosing failure’
outputs are activated.
∗
a low tolerance (tolérance -) or tolerance in default :
if the difference |(target weight – dosing result) > tolérance - |
where (target weight – dosing result) > 0, the ‘out of tolerances’ and ‘dosing failure’
outputs are activated. If the ‘use FF if out of low tolerance -’ is active, the fine feed is
restarted.
12.2.10 End of cycle waiting time
This timer is triggered after ther control of tolerances or after the end of the reloading phase if the
reloading mode is set to ‘at the end of the cycle’.
12.2.11 Effective end of the cycle
When the ‘end of cycle wating time’ is over, an output assigned to the ‘cycle in progress’ function is
disabled and the statistic variables (number of cycles, average value, running total and standard
deviation) are updated.
If the reloading mode is set to ‘at the end of the cycle’ and if the gross measurement is inferior to the
‘reloading min level’, the reloading phase starts (cf. §12.1.1) and the effective end of the cycle (‘cycle in
progress’ inhibition and statistic variables update) occurs when this phase is over.
12.3 Digital inputs utilization
12.3.1 Start cycle
If all the starting conditions are respected (cf. §12.2.2), a rising or a falling edge (depending on the
configured logic) on this input causes a new dosing by unloading cycle to be started else an error is
reported by a ‘dosing failure’ output and into a read-only diagnostic register.
12.3.2 Suspend current cycle
This input function has got two different effects :
∗
if the ‘relaunch cycle if suspended’ option is inactive : this edge-active input causes the
feeding cycle to be stopped inhibiting the different outputs involved.
∗
else the cycle is suspended until a new request of starting the cycle that causes the cycle to
continu from its last step.
12.3.3 Stop cycle
This edge-active input causes the feeding cycle to be stopped inhibiting the different outputs involved.
