Controller functions
UPT-640 (as of SW 100)
35
9.12
Maximum starting temperature
You can set the required maximum starting tempera-
ture in step 224. This temperature is the maximum per-
missible actual value at the start time. The value is
determined by the controller at the start of each impulse
and compared with the value set in step 224.
This function serves to monitor the cooling circuit.
If the cooling system is intact, the tool is cooled down
according to curve 1). If the cooling system is faulty, it
is cooled down according to curve 2) because the water
is no longer cooled. As a result, the temperature is
always at least the value set with this menu step. In this
case, the controller ignores the next heating command
and reports an alarm. The corresponding error
code 305 is indicated and the fault output is switched
(
section 9.27 "Fault areas and causes" on page 50).
This prevents the UPT sealing bar from being damaged
beyond repair.
The maximum value of the setting range is
limited either by the maximum value speci-
fied with step 206 in the Configuration menu or by
the temperature range set with step 205.
Setting:
We advise you not to set this parameter until you have
determined the optimum heatsealing parameters (tem-
perature and cooling time) for productive operation.
The starting temperature should be set to approxi-
mately 50% of the heatsealing temperature for the trial
run, to enable the optimum working parameters to be
established correctly.
9.13
Cycle counter
Each activation of the "START" signal during operation
is detected by a cycle counter integrated in the con-
troller. Actuations of the "HAND" key are not counted.
The counter reading can be displayed with step 214 in
the Configuration menu.
The cycle counter is reset to 0 if the "ENTER" key is
pressed or if the maximum count of 999.999.999 cycles
is exceeded.
9.14
Hold mode
The behavior of the digital indication of the ACTUAL
temperature in the home position can be changed with
step 106 in the Settings menu. The following settings
are possible:
1.
"OFF" (Factory setting)
If the main menu is visible on the display, the real
ACTUAL temperature is always indicated.
2.
"ON"
If the display is in the home position, the ACTUAL
temperature that was valid at the end of the last
heatsealing phase is always indicated as a digital
value. When the controller is switched on, the real
ACTUAL temperature is indicated until the end of
the first heating phase.
3.
"2 s"
It causes the current ACTUAL temperature to be
displayed as a digital value for an additional
2 seconds at the end of a heatsealing phase. This
temperature is then indicated again in real time until
the end of the next heating phase.
Hold mode only affects the digital value on
the display. The ACTUAL temperature in real
time is always indicated, regardless of the setting,
by the dynamic bar and the actual value output.
Set starting
Time
temperature
Temperature
2)
1)
Starting temperature if cooling
system faulty
Starting temperature if cooling system OK
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