
Controller functions
Page 36
RES-409
Version 1
The "START" signal (START 1) for set point 1 is activated by applying a 24VDC signal at terminals 7+8.
The set point selected for the heatsealing temperature must be greater than 40°C. If not, the heatsealing band is
not heated ("HEAT" LED blinks).
The fault output is switched if a "START" command (or the "START" signal) is activated while a warning message
with error codes 8…12 (as of February 2007 also: 104…106, 111…114, 211, 302, 303) is displayed
(
section 10.16 "Error messages" on page 52). The heatsealing band is no longer heated.
The 24VDC "START 0" signal has the highest priority and overwrites the values specified by both
the 24VDC "START 1 signal and all "START" commands sent via the CAN interface.
The 24VDC "START 1" signal has the lowest priority. All START sent commands via the CAN interface and
the 24VDC "START 0" signal have higher priority.
10.3.3 Automatic zero calibration (AUTOCAL)
Owing to the automatic zero calibration (AUTOCAL) function, there is no need to adjust the zero point manually
on the controller. The "AUTOCAL" function matches the controller to the current and voltage signals that are
present in the system.
The automatic calibration process takes around 10…15 seconds. The heatsealing band is not heated.
The yellow LED on the front panel lights up when the "AUTOCAL" function is active. The actual value output
(terminals 17+18) is set to 0…3°C (corresponds to approx. 0 VDC).
If the temperature of the heatsealing band varies on controllers manufactured as of February 2007, the
"AUTOCAL" function is run a maximum of three times. If the function still cannot be executed successfully, an error
message appears (error code 114;
section 10.16 "Error messages" on page 52).
The initial temperature (ambient temperature) of the heatsealing bar(s) which is currently valid for calibration can
be set in the 0…40°C range. The CAN message "Store calibration temperature" (address 6, receive) is used for
this purpose. The last stored calibration temperature is displayed as the CAN message "Actual calibration
temperature" (address 8, send). The default value is 20°C.
The CAN message for starting the "AUTOCAL" function (address 4, value 5) is executed by the controller
immediately providing the "AUTOCAL" function is not locked. "AUTOCAL active" appears in the controller status.
You should always wait for the heatsealing band and the bar to cool down (to ambient temperature)
before running the "AUTOCAL" function.
Reasons for locked "AUTOCAL" function:
RES-409
max. 6mA
7
6
START 1
(set point 1)
+
-
GND
24VDC
START 1
(set point 1)
HIGH:
≥
12VDC
LOW:
≤
2VDC
!
!