hotset hotcontrol cDT+, Руководство по запуску, обслуживанию и эксплуатации

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138
Chapter 15
Functions
Rev. 1.00.05
Subject to technical changes
15 Functions
In this chapter functions and corresponding parameters of hot runner controllers are described.
15.1 Heating current measuring - and - monitoring
Description The objective of heating current measuring and monitoring is:

to determine heating currents by measuring

to compare measured values with setpoint values and tolerance

to execute a plausibility check
The heating current measuring is implemented in a fixed time raster.
How it works Beside the display of the active heating currents, the heating current measuring pro-
vides information on the heater's condition (total fail, partial fail if heaters in parallel)
and monitors current data considering a tolerance band.
It monitors power controller condition and reports an alarm for continuously running
heating output (e.g. permanently short-circuit SSR's), which can cause damage from
overheating.
It supports a number of controller functions. For example, bad adjustments of control
parameters can be avoided because the automatic parameter identification (auto
tuning) is only started if a corresponding heating current is recognized in the control
zone, i.e. when it is certain that the zone is ready for heating. Else, the starting of the
identification function is delayed until a heating current is recognized.
What good is it Hence, a wrongful adaptation is prevented without user input or additional software.
Setting by

Automatic ramp (page 139)

[P005]Current tolerance (page 191)
For further details on parameters ([P***], [SP**], [CP**]) see Manual Parameters hot-
control cDT+ .
Description Heating current measuring is standard in each hot runner controller. The heating cur-
rent measuring is done by so called current transformers.
The hot runner controller hotcontrol cDT+ can display residual current. This indi-
cates important information on the status of the heater in the hot runner and gives
early enough notice of a damage.
What good is it One can react immediately and longer downtimes due to unnecessary tool removal
and repair are omitted.