Instruction manual H1252
HASCO hot runner 7
2Features and functionality
2.1 General information
Hot runner controllers H1252/6x16 and H1252/12x16 are especially suited to the temperature control of hot runner moulds
on injection moulding machines. The controllers are linked directly to the mould via a cable connection.
During operation, hot runner controllers deliver electric current to the heating units on an injection mould. The so-called
heating current leads to an adjustable temperature increase in the heating units and hence in the mould. In parallel,
continuous temperature monitoring takes place via thermocouples that are connected up. In the event of deviations between
the current temperature recorded and the temperature set on the hot runner controller, the heating current is automatically
adjusted via a self-adapting PID control algorithm until the two temperatures are identical.
The controller variants of H1252/6x16 and H1252/12x16 differ solely in terms of the number of control circuits that are
possible. These are also referred to as heating zones. Depending on the variant, units are available with either 6 or 12 heating
zones.
2.2 Structure
Housing front: The hot runner controllers H1252/6x16 and H1252/12x16 are operated via the front of the housing (Figure
1). Alongside the three-pole main switch for switching the controller on and off, there are 12 buttons ensuring convenient
operation. The front of the unit also contains all the visualisation elements. The setpoint values and actual values of the
individual zones are portrayed via 7-segment displays. If required, the display can be switched to heating current and output
level. In addition, status LEDs provide information on operating modes and messages for the individual zones. The controller
status is visualised in colour via a fault-message display that is visible from a long way off. In normal operation, this display is
lit up green. In the event of a warning or an alarm, the display switches to yellow or red (traffic light status). This enables the
controller status to be readily assessed from a distance. A detailed description of the display and operating functions may
be found in Chapters 3.2 and 4.
Housing rear: All the connections and fuses of the hot runner controller are located on the rear of the housing (Figure 2). In
addition to the connection lead used to connect the controller to the mains electricity, the controllers have a further
connection for a potential-free alarm contact and a 24V digital input for external control of reduced-temperature (standby)
operation. The connection to the hot runner mould is achieved via 24-pole plug systems. The centrepiece of the hot runner
controller is the integral I/O board that is mounted on the rear of the controller housing. Each board contains the electronics
for 6 heating zones, the corresponding fuses and a cooling element. To ensure easy handling in the event of an error, all the
fuses for the I/O board are accessible on the rear of the housing.
