4.7 “CHECK” status
At the controller start, all the zones with one of the anomalies listed below:
• heater failure
• thermocouple failure
• heater and thermocouple not connected
are automatically disabled.
The status of these zones is “CHECK”, the output power is 0%. These zones are not considered
by digital output functions. (see paragraph 8.2).
It’s possible to manually modify the “CHECK” status to “MAN”, “SLAVE” or “OFF.
Only if the anomaly is removed it is possible to change the status to “AUTO” manually or by
mean of restarting the controller.
4.8 Slave
Is a valid alternative to manual functioning in case the thermocouple fails. It is possible to
submit a zone (“SLAVE” zone) to another (“MASTER” zone) having the same thermal
characteristics. The same power will be supplied and updated in time to the two heaters.
4.9 Plastic leakage alarm
In case plastic material leaks, the power absorption of the heater increases substantially. The
temperature controller finds this increment in the power necessary to maintain a certain “set
point” temperature and signals the anomaly allowing for a rapid intervention.
“Normal” absorption is memorised for each zone when the operator responds positively to
the question “Are the moulded pieces OK?”. Reset of the values memorized happens at each
modification of the set point and every time the Auto-Tuning function is activated.
4.10 “Boost” function
With some nozzles and some polymers, at the production start-up, it’s compulsory to increase
Set Point temperature in all the nozzle zones.
It’s possible to set a different temperature increase in each regulating zone (zone parameter
“BOOST delta” (Idx 7)). This function can be enabled and disabled manually for all the zones
contemporary after the Set Point is reached.
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