Controller functions
Version 1
RES-407
Page 27
The "AUTOCAL" function is activated by means of a 24VDC pulse at terminals 5+14.
The automatic calibration process takes around 10…15seconds. The heatsealing band is not heated during this
process.
The yellow LED on the front panel lights up when the "AUTOCAL" function is active. The actual value output
(terminals 14+17) is 0…3°C (corresponds to app. 0 VDC).
If the temperature of the heatsealing band varies on controllers manufactured as of April 2005, the "AUTOCAL"
function is executed a maximum of three times. If the function still cannot be terminated successfully, an error mes-
sage appears (
section 7.13 "Error messages" on page 34).
You should always wait for the heatsealing band and the bar to cool down (to ambient temperature)
before activating the "AUTOCAL" function.
Reasons for disabled "AUTOCAL" function:
1. The "AUTOCAL" function cannot be activated until 10seconds after the controller is switched on. If you attempt
to activate it sooner, it will not work.
2. The "AUTOCAL" function cannot be not activated if the heatsealing band cools down at a rate of more than
0.1K/s. If the control signal is activated, the function is executed automatically providing the cooling rate has
fallen below the above-mentioned value.
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 (
section 7.13 "Error messages" on page 34). 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).
7.5
"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.
RES-407
max. 6mA
5
14
AUTOCAL
+
-
GND
24VDC
AUTOCAL
0.1…5s
HIGH:
≥
12VDC
LOW:
≤
2VDC
13
!
