Device functions
Version 5
UPT-6011
Page 26
The base resistance of the heatsealing element increases during the operation determined by the
design continuously. To prevent measurement errors of the ACTUAL temperature the AUTOCAL
function must be performed approximately every 100000 sealing cycles.
8.5.2
Start (ST)
When the START bit is set (ST bit = 1), the controller’s internal set / actual comparison is enabled and the heating
element is heated to the SET temperature. It remains at this temperature either until the ST bit is reset or until the
actual heating time exceeds the preset heating time limit (
section 8.7.6 "Heating time limit" on page 54).
The "HEAT" LED on the front panel of the UPT-6011 lights up continuously for the duration of the heating time.
A start request is not processed as long as the AUTOCAL function is active, a fault is present on the controller,
the set point is less than 20 °C higher than the calibration temperature, or the RS bit is set. In this case, the "HEAT"
LED blinks.
The heatup process is terminated if the ST bit is reset or a communication error occurs.
The ST bit is only accepted if the AUTOCAL function is deactivated and there are no faults.
The alarm relay is switched if the ST bit is set while a warning with error code 104…106, 111…114, 211, 302, or
303 is indicated (
section 8.19 "Error messages" on page 67). The heating element is not heated.
8.5.3
Reset (RS)
This bit resets the controller if the controller shows a fault.
No AUTOCAL or START requests are accepted as long as the RS bit is set. Until it is reset again, only error codes
201…203, 901, 913 are evaluated and output by the error diagnosis function. The power unit is not activated in
this state and no measuring impulses are generated. As a result of this, the actual value is no longer updated. The
reset request is not accepted until the RS bit is reset. EtherNet/IP
TM
Communications are not interrupted by a con-
troller reset.
The controller actual value output changes to 0…3 °C (i.e. approximately 0 VDC) and the SA bit is set in order to
set the RS bit.
The AUTOCAL function is not cancelled if the RS bit is set while it is executing.
The controller performs an internal initialization lasting approximately 500 ms after the RS bit is reset. The next
heatsealing process cannot be started until it has finished.
If a Kb contactor is used to deactivate the control loop (
section 6.3 "Power supply" on page 12), it must be reli-
ably energized again 200 ms at the latest after the RS bit is reset (note the contactor switching and delay times).
If it is energized too late, an error message appears on the controller.
8.5.4
Measurement pause (MP)
No more measuring impulses are generated by the controller as soon as the MP bit is set. Until it is reset again,
only error codes 201…203, 901, 913 are evaluated and output by the error diagnosis function. In addition, the
actual value is no longer updated. The last valid value before the bit was set is output. As soon as the bit is reset,
new measuring impulses are generated, all error messages are evaluated, and the actual value is updated again.
This bit is only active in measurement mode. The bits ST, RS, and AC take priority.
The bit is suitable for all applications where the electrical connections of the heating element must be disconnected
during normal operation without triggering a fault (e.g. sliding rail contacts).
Unlike the RS bit (RESET), the MP bit does not reset any faults when it is set. The controller is active again as
soon as the bit is reset, in other words there is no initialization phase.
When the controller is switched on, it does not evaluate the MP bit until the system test (including the functional
test of the heating circuit) has been successfully completed. This can take several hundred milliseconds.
8.5.5
Master AUTOCAL (MA)
Setting this control bit starts a calibration as described in section 8.5.1 "Automatic zero calibration AUTOCAL
(AC)" on page 25. However, if the AUTOCAL function is successful, the heating element resistance which is deter-
mined by the controller is also used as a reference value, e.g. after replacing the heating element.
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