Controller functions
RES-445
Page 37
messages“ auf Seite 49). The heatsealing band is
likewise not heated.
If a "PREHEAT" signal is used, it is deactivated
internally during the heating and control process. The
heatsealing band is not returned to the set preheating
temperature until the "PREHEAT" signal is activated
again at the end of the control process for the main heat
(Kap. 10.10 „"PREHEAT" signal (preheating without
time control)“ auf Seite 37).
10.10
"PREHEAT" signal (preheating
without time control)
The heatsealing band can be heated to a specified
preheating temperature with the "PREHEAT" function,
in order to shorten the temperature rise time to the
selected SET temperature for time-critical applications.
The preheating temperature is set with step 2 in the
Settings menu:
The "PREHEAT" signal can be activated in two ways:
• By means of a 24VDC signal at terminals 20+22.
• By means of a control contact at terminals 2+19
The "START" signal is disabled as long as the
AUTOCAL function is executing in the
Settings menu (with step 7).
The value that is selected for the preheating
temperature (step 2 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 "PREHEAT" signal is
activated while an alarm signal is indicating error codes
104…105, 111…113 or 211 (
!
messages“ auf Seite 49). The heatsealing band is
likewise not heated.
If a "PREHEAT" signal is active, it is deactivated
internally for the duration of a heating and control
process that is activated either by means of the
"START" signal or by pressing the "HAND" key.
RES-445
max. 6mA
22
20
PREHEAT
+
-
GND
24VDC
PREHEAT
HIGH:
≥
12VDC
LOW:
≤
2VDC
RES-445
19
PREHEAT
with
contact
0V
2
max.
5mA
!
"PREHEAT"
signal
ACTUAL
temperature
"START"
signal
24VDC
24VDC
T
2
T
1
T
1
= Preheating temperature (PREHEAT)
T
2
= Heatsealing temperature
t
t
t
0
0
0
