Controller functions
Page 28
RES-407
3. If the "START" signal (24VDC) is active, the
"AUTOCAL" function is not executed ("HEAT" LED
lit).
4. If the "RESET" signal (24VDC) is active, the
"AUTOCAL" function is not executed.
5. The "AUTOCAL" function cannot be activated if
error codes 101…103, 201…203, 801 or 9xx (up to
March 2005: error codes 1…3, 5…7) occur on
startup (
ª
section 10.13 "Error messages" on
page 32). If the controller has already operated
correctly - at least once - after starting up, the
"AUTOCAL" function cannot be activated with error
codes 201…203, 801 or 9xx (up to March 2005:
error codes 5…7).
10.5
"START" signal (HEAT)
When the "START" signal is activated, the controller-
internal set/actual comparison is enabled and the
heatsealing band is heated up to the SET temperature.
It remains at this temperature until the signal is
deactivated again.
The "HEAT" LED on the front panel of the RES-407 is
lit continuously for the duration of the heating phase.
The "START" signal is activated by means of a 24VDC
signal at terminals 6+14.
The "START" signal is disabled as long as the
"AUTOCAL" function is executing or the
„RESET“ signal is active.
The set point that is selected for the heatsealing
temperature must be greater than 40°C. If not, the
heatsealing band will not be heated up.
The alarm output is switched if the "START" signal is
activated while an error message is indicating error
codes 104…106, 111…114, 211, 302 or 303 (up to
March 2005: error codes 8…12) (
ª
"Error messages" on page 32). The heatsealing band is
no longer heated up.
10.6
"RESET" signal
The RESISTRON temperature controller RES-407 can
be reset by means of an external "RESET" signal at
terminals 7+14). 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
(Note: The error message is not reset until the
"RESET" signal is deactivated)
As of SW revision 103, the controller actual value
output changes to 0…3°C (i.e. approximately 0VDC)
while the "RESET" signal is being activated. This may
be interpreted by the higher-level controller (e.g. a
PLC) as feedback.
The "AUTOCAL" function is not aborted if the "RESET"
signal is activated while it is still executing.
RES-407
max. 6mA
6
14
START
(HEAT)
+
-
GND
24VDC
START (HEAT)
HIGH:
≥
12VDC
LOW:
≤
2VDC
13
!
RES-407
max. 6mA
7
14
RESET
+
-
GND
24VDC
RESET
>0.1s
HIGH:
≥
12VDC
LOW:
≤
2VDC
13