Hotset GmbH
139
Start-up-, Service- and Operation Manual hotcontrol cDT+
Rev. 1.00.05
Subject to technical changes
15.2 Automatic ramp
The maximal temperature difference of each zone based on the reference zone during heating-up is configurable
(parameter (a)). In the event a zone exceeds this limit the output value will be corrected.
A zone is taken off the link of the automatic ramp, if
a sensor error (e.g. FAL) occurs in the zone
the zone is in manual mode
the manual temperature ramp is active
the zone is passive
The automatic ramp function is triggered 5 K before reaching the setpoint values; the zones heat up to the final
setpoint value without any output value intervention.
Description
The different dimensions of zones in the hot runner cause different heating-up times
and different temperature levels. That means, that the nozzles have already reached
the setpoint value and the manifold zones are still far from.
Herefrom result temperature dependent expansions of steel, which cause unwanted
mechanical tensions.
How it works
The automatic ramp function was developed to eliminate the causes of mechanical
tensions. All zones are uniformly heated up. All zones orientate themselves automat-
ically on the slowest zone. Its actual value is a reference for the setpoint value for the
other zones.
What good is it
With this measure all zones remains at heating-up automatically on the same tem-
perature level. The hot runner is disburdened and protected. Hereby damage is re-
duced and service intervals are extended. Maintenance costs are reduced.
Setting by
[SP02]Automatic ramp tolerance band (page 193)
[SP03]Automatic ramp setpoint value change (page 193)
[P022] Automatic ramp (page 191)
For further details on parameters ([P***], [SP**], [CP**]) see Manual Parameters
hot-
control cDT+
.
Text in zone display see chapter
Messages - Alarms, Status, Functions (page 73)
Specifies the minimum setpoint value
increase to start the automatic ramp
function.
Parameters
[SP03]Automatic ramp setpoint value change (page 193)
Specifies the maximum difference be-
tween the actual values and reference
zone.
Parameters
