Ropex RES-445 - (Preheating); PREHEAT Signal

Controller functions
RES-445 Page 47
"Fault areas and causes" on page 64). The heatsealing
band is likewise not heated.
If a "PREHEAT" signal is used, it is deactivated inter-
nally during the heating and control process. The heat-
sealing band is not returned to the set preheating tem-
perature until the "PREHEAT" signal is activated again
at the end of the control process for the main heat
(Kap. 10.11 „"PREHEAT" signal (preheating)“ auf
Seite 47).
10.11 "PREHEAT" signal
(preheating)
The heatsealing band can be heated to a specified pre-
heating 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 102 [2] in
the Settings menu. The "PREHEAT" signal can be acti-
vated 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 Set-
tings menu (with step 107 [7]).
The value that is selected for the preheating tempera-
ture (step 102 [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 error message is indicating error
codes 104…105, 111…113 or 211 ( section 10.27
"Fault areas and causes" on page 64). The heatsealing
band is likewise not heated.
If a "PREHEAT" signal is active, it is deactivated inter-
nally 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