16502 PIREG-C2 Gerätebeschreibung mit EtherNet_IP Bussystem191017 - EN.docx/ Page 5 of 66
V1.00/1.01/1.01 from which they are valid. The device and program versions are read by command
(VERS) via the interfaces.
2. Short description
The PIREG-C2 resistance temperature controller with an EtherNet/IP interface as bus system is used to
control the temperature of heating conductors for the heat-impulse sealing of foils. The sealing transform-
er is used by the PIREG-C2 on the primary side. The internal actuator or an external solid-state relay
which is controlled by the PIREG-C2 can be used. The heating conductor is fed from the secondary side
of the transformer. The measuring signals are received directly at the heating conductor and are made
available to the controller.
The temperature coefficient Tc of the heating conductor must be positive. This increases the resistance of
the heating conductor when heated. This effect is used for temperature control. The temperature control-
ler measures and regulates the resistance of the heating conductor. The temperature coefficient Tc is a
material constant that depends on the alloy used for the heating conductor. The actual temperature is
determined by measuring the voltage and current.
The PIREG-C2 operates as a proportional control unit that independently determines the P-factor (the
control amplification) for the controlled system of a process during calibration itself. The controlled system
consists of a sealing transformer and a heating conductor. The P-factor determined during calibration can
afterwards still be corrected by command or via the target value input ( 4.7. and 4.11.). An additional
compensation function allows to minimise the permanent control deviation typical of a proportional con-
troller.
The PIREG-C2 is operated either conventionally with a setpoint potentiometer or setpoint voltage, actual
value instrument, LEDs and switches or digital signals ( 4.1. - 4.3.), or via the EtherNet/IP interface, the
RS232, RS485 or USB interface ( 4.4. – 4.13.) with which the PIREG-C2 is equipped. The PIREG-C2
can only be set via the EtherNet/IP interface or the RS232, RS485 or USB interface. Combinations of
both types of operation are possible.
The PIREG-C2 is set to the temperature coefficients ( 4.7. and 4.11.). If the temperature coefficient
values differ, the setpoint voltage must be corrected. The PIREG-C2 can also determine the actual tem-
perature coefficient of a heating conductor itself by means of a temperature coefficient correction (Tc
correction) ( 4.7. and 4.11.). Connect the PIREG-C2 via the RS232 interface to an external TM6 ther-
mometer which measures the actual temperature of the heating conductor to simplify the Tc correction.
Depending on the setting, the PIREG-C2 can operate up to a temperature range of 500 °C.
During calibration, the controller sets itself to the secondary voltage of the transformer and the current
through the heating conductor. The secondary voltage of the transformer may be within a range of 1...120
V. The current measured with a current transformer can range from 20 to 500 A. The calibration values
can be stored in the controller, so that there is no need for renewed calibration and start-up time after
switching on the power when conditions have not changed.
The PIREG-C2 can conduct the calibration at room temperature (always taken to be 20°C) as well as at
any other ambient temperature between 0 - 50 °C. The controlled is informed of the actual reference tem-
perature from outside. This is advantageous in the case of constant sealing temperatures with different
environmental conditions( 4.7.8 and 4.11.).
High quality sealing transformers, such as toroidal core transformers, are switched by the PIREG-C2 on
the primary side. A smooth switching procedure is employed that compensates for the remanence of the
sealing transformer. An initialising remanence setting is made automatically after switching on the power
and following calibration. Only a short remanence setting lasting 40 ms for El core transformers and 80
ms for toroidal core transformers is needed before each sealing process. If, with toroidal core transform-
ers, the pause between two sealing processes is longer than 10 minutes, the remanence setting takes
160 ms. The remanence is the residual magnetization in the transformer's iron core. During the initial
remanence setting procedure, the heating conductor has to be heated for a short time to approx. 40 to 70
C. The PIREG-C2 itself uses a phase angle controller to regulate the temperature.
3. Operating states
3.1. Calibration
During calibration, the PIREG-C2 automatically adapts to the sealing transformer/heating conductor com-
bination. At the same time, the voltage "Vr" at the heating conductor and the current "Ir" through the heat-
ing conductor are measured every second. In this condition, the blue "calibration" LED is lit up and the
calibration OK signal is reset. The calibration OK signal is sent by the OK output if the appropriate func-
tion has been set by command (KONF). The OK output is factory set to the Calibration-OK message fea-
ture. The actual value output is used to display the individual steps. The actual value output is updated
every second.
The calibration procedure with the individual states is available as data at the EtherNet/IP interface and
the other interfaces. The controlling PLC can additionally track the calibration process by observing the
actual value output at terminal 17 and can recognise the end of the calibration from the calibration OK
signal. The sealing controls are then released. During calibration steps 1 to 7, no "Start" signal may be
given as otherwise the PIREG-C2 will interrupt the calibration with error 2.
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