Startup and operation
24
RES-430
aling cycle is immediately interrupted and an alarm
(error code 817, 818) is indicated on the display.
This monitoring function serves, among other things, to
ensure a constant closing force of the sealing jaws.
Up to software revision 007:
The force diagnosis begins 100ms after the ACTUAL
temperature reaches 95% of the SET temperature and
continues until the end of the parameterized cooling
phase.
As of software revision 008:
The force diagnosis function can be additionally para-
meterized by means of step 247 in the configuration
menu. The following settings are possible:
1.
"OFF" (Factory setting)
Force diagnosis deactivated
2.
"Active during heatsealing cycle"
The force diagnosis is permanently active during the
heatsealing phase until the end of the paramete-
rized cooling phase. If this setting is activated, an
additional delay time between 0 and 9.9s can be
parameterized with step 248 in the Configuration
menu. This delay time starts when the ACTUAL
temperature reaches 95% of the SET temperature.
The force diagnosis function is activated as soon as
the delay time elapses.
The force diagnosis function can thus be explicitly
deactivated during the closing movement of the
sealing jaws, for instance.
3.
"End of heating phase"
A single force diagnosis takes place at the end of
the heatsealing phase.
4.
"End of cooling phase"
A single force diagnosis takes place at the end of
the cooling phase.
9.5.3
Calibration of the load cell
interface / Force indication
The integrated load cell must be calibrated to the spe-
cifics of each machine when the controller is started up.
The necessary values can be entered with
steps 244+245.
The load cell can be tared with step 244 when it is off-
load. After loading the cell with a defined, known
weight, the associated reference force must be entered
with step 245. A straight force measurement curve is
assumed between these two measuring points (tare
weight and reference force).
The measured force is only indicated if it is within the
permissible limit values. If the upper or lower limit value
is exceeded, the following information is indicated on
the display:
Minimum force
Force
Time
Error message
Maximum force
Measured force
Indication
on display
Error code
(if force
diagnosis
is active)
Minimum force
exceeded
(force < -100N)
" - - - - - "
Maximum force
exceeded
(force > 1500N)
" +++++ "
Lower range limit
exceeded
(measured
value < -2.2mV)
" LLLLL "
813
Upper range limit
exceeded
(measured
value > 12.2mV)
" HHHHH "
814
Load cell not con-
nected
" ***** "
820
Measured
Reference
Weight
0
Tare (zero)
force
Reference force
