GMC-I Messtechnik GmbH
R2500–25
Hot-Runner Control
By configuring the switching output for heating as a hot runner (
Outx
=
Hotr
), the manipulated variable is read out as a rapidly pulsating signal, i.e.
actuation cycle time is 0.1 seconds regardless of the
actuation cycle time
parameter setting.
With the help of this configuration, the
start-up circuit
and
boost
functions are also enabled.
Start-Up Circuit
The start-up circuit is enabled with the
StUP
=
YES
configuration, or by means of the binary input when it has been configured as follows:
In1
=
StUP
.
The start-up circuit is only enabled for
controller type
PDPI
. No start-up occurs for other controller types.
The start-up procedure is initiated
if the actual value is more than 2 °C less than the
start-up setpoint
after auxiliary voltage is turned on (reset)
or after the off state has been ended,
or if the actual value drops to more than 40 °C less than the
start-up setpoint
after a start-up procedure has
been completed or during dwell time.
Start-up continues
until the actual value exceeds the
start-up value
minus 2 °C.
The control variable is limited to the
start-up manipulating factor
.
Dwell time then begins,
which is selected with the
dwell time
parameter.
The controller regulates temperature to the actuation setpoint.
The actuation procedure is ended
as soon as dwell time has expired.
The controller then regulates temperature to the valid setpoint.
If the currently valid setpoint is still so far beneath the start-up setpoint that the condition for ending actuation cannot be fulfilled, the start-up procedure
continues indefinitely. In this case, control variable limiting by means of
maximum manipulating factor
would be advisable.
Содержание R2500
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