Controller functions
34
UPT-640 (as of SW 100)
The set point that is selected for the heatsealing tempe-
rature (step 101 in the Settings menu) must be greater
than 40°C. If not, the heatsealing band will not be
heated up.
The alarm relay is switched if the "START" signal is
activated while an error message is indicating error
codes 104…105, 111…113 or 211 (
section 9.27
"Fault areas and causes" on page 50). The heatsealing
band is likewise not heated.
9.10
"RESET" signal
The CIRUS temperature controller UPT-640 (as of SW
100) can be reset by means of an external "RESET"
signal at terminals 20+26.
As a result:
• A heatsealing cycle is aborted if one is in progress
• No more measuring impulses are generated
• An error message is reset if one is present
The actual value output changes to 0…3°C (i.e. appro-
ximately 0VDC) while the "RESET" signal is being acti-
vated. This may be interpreted by the higher-level con-
troller (e.g. a PLC) as feedback.
The message "External RESET signal active" is addi-
tionally displayed on the controller when the "RESET"
signal is active.
The "AUTOCAL" function is not aborted if the "RESET"
signal is activated while it is still executing.
The controller executes an internal initializa-
tion for approximately 500ms after the
"RESET" signal is deactivated. The next heatse-
aling process cannot be started until it has fini-
shed.
If a contactor Kb is used to deactivate the
control loop
(
Kap. 7.3 „Power supply“ auf
Seite 13
),
it must be energized again 50ms at the
latest after the "RESET" signal is deactivated. If it is
energized too late, an error message will be output
by the controller.
9.11
Correction factor Co
The correction factor Co permits the UPT-640 con-
troller to be adapted to the real conditions in the
machine (type of UPT heating element, impulse trans-
former specification, length of connecting wires, cooling
etc.).
Proceed as follows to determine the optimum correc-
tion factor Co (setting in step 6):
1. Controller settings:
- Set temperature: 160…180°C (step 101)
- Hold function:
2s
(step 105)
2. Activation of sealing pulses with of 0.2…0.3s.
Slowly increase the correction factor – starting either
with the lowest value (50%) or with the value recom-
mended in the ROPEX Application Report minus 25%
– to the indicated hold value = set temperature.
The correction factor should be checked, and if neces-
sary corrected, whenever the machine is operated or
the set temperature or the heatsealing time are
changed.
UPT-640
max. 6mA
26
20
RESET
+
-
GND
24VDC
RESET
>0.1s
HIGH:
≥
12VDC
LOW:
≤
2VDC
!
!
Temp.
Time
x
x
Hold value
Co too large
Co too small
T
set
