16502 PIREG-C2 Gerätebeschreibung mit EtherNet_IP Bussystem191017 - EN.docx/ Page 9 of 66
3.1.10. P-factor correction: The P-factor correction is used for subsequent manual correction of the
calibrated P-factor ( 3.1.7.) in the case of very unfavourable conditions of the sealing transform-
er/heating conductor combinations or the public supply. The correction range is 30…110 %.
The P-factor correction can be set by command (KPFK). The P-factor correction value will not be reset
during a calibration as it is system dependent.
3.2. OFF state
In the OFF state, the PIREG-C2 regularly measures the resistance of the heating conductor and from this
value determines the temperature and forwards this to the actual value output.
For each resistance measurement a positive and negative power line half-wave of the same fixed angle
of current flow (1.8 ms at 50 Hz mains frequency) is applied to the transformer. The time intervals of the
measurements depend on the temperature of the heating conductor. When the heating conductor has
reached a temperature of 20 °C, the measuring interval is 1.5 s. At a temperature of 300 °C, the measur-
ing interval is only 100 ms.
The heating conductor is heated in the OFF state and dependent on the voltage by the energy introduced
when measuring the resistance.
The controller switches from the OFF state to the ON state as soon as the “Start” signal is applied. When
the "Calibration Start" signal is applied the PIREG-C2 returns to calibration and to the OFF state after the
end of a successful calibration. The PIREG-C2 then stays in the OFF state even when the "Calibration
Start" signal is still applied (evaluation of the rising edge).
If the pulse control was configured by command (KONF) for the calibration start input (5), the PIREG-C2
switches in the single-point Tc correction when a high-signal is applied for less than one second.
3.2.1. Measurement pulse-pause: In the off state, the measurement pulse-pause can be switched on
and off per command (MEPA). When measurement pulse-pause is activated, the PIREG-C2 stops send-
ing measurement pulses to the sealing transformer in order to determine the temperature of the heating
conductor.
The actual value output indicates the value determined last. Only the monitoring of the mains voltage and
the device function is still active. All other monitoring functions that relate to the measurement pulses are
disabled.
The measurement pulse-pause is for applications in which the primary or secondary circuit of the sealing
transformer has to be interrupted during operation without the PIREG-C2 switching to the error state.
With the start of a sealing process, a calibration or a reset, the measurement pulse-pause is automatically
terminated.
3.2.2. Calibration switching: The PIREG-C2 offers the possibility to save eight calibrations and to switch
between them by command (KANR). In the off state, a changeover between the eight calibrations is
made by command (KANR). Calibration 1 is always active after power on or reset.
The heating conductors of the eight calibrations must be the equal for the temperature coefficient, tem-
perature range and the other calibration settings. A possible temperature coefficient correction is per-
formed separately for each calibration. The PIREG-C2 performs its own calibration for each heat conduc-
tor, which is also stored separately.
3.3. ON state
In the ON state, the PIREG-C2 controls the temperature of the heating conductor in accordance with the
target value. A phase angle controller is used. The controller returns to the OFF state when the “Start”
signal is removed.
3.4. Error state
The error state is indicated on the PIREG-C2 only when an error occurs. The controller monitors the line
voltage, the temperature of the heating conductor, the values of the voltage and current measurements at
the heating conductor and the calibration parameters.
The alarm output is set in the error state. In the event of a power line error (error 3), actuation takes place
with a delay of 2 seconds. In the error state, the alarm and calibration LED’s are triggered with different
cycle rates of 1 or 4 Hz depending on the error that has occurred (see Table 1). The actual value output is
also cycled in some error cases. The voltage at the actual value output then changes every second be-
tween the voltages applicable to the different errors (see table 1). The error state can only be cancelled
by switching off the power supply, the „Reset“ signal and „Calibration Start“. With errors 1 and 3 the error
state cannot be cancelled with the "Calibration Start" signal.
In the OFF state, after switching on the power or following a reset, errors 4 - 13 are only reported by the
LEDs and actual value output; however, the alarm output is not set in the factory default. This way, a cali-
bration error does not lead to a machine malfunction when switching on. The factory setting can be
changed with a command (KONF).
3.4.1. Temperature monitoring: The monitoring of the temperature is an additional monitoring function
which is activated and adjusted with a command (TUEE). The actual temperature value is monitored dur-
ing the sealing process in the ON state to ensure that it is within a temperature OK range. If the actual
value leaves the temperature OK range during the sealing process after the stabilisation time has ended
the PIREG-C2 will go to error state with error 8. In the event of a change of the target value by more than
2 °C, the stabilisation period is restarted.
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