Specifications

7
Series RMB Hot Runner Controller Instruction Manual
2.3.5 View Setpoint, Output,
and Current
To cycle through the lower line
displays: Press the DISPLAY key
repeatedly.
• In normal mode you can cycle
through the setpoint, output
percent (with P), and heater
current to the closest tenth of an
amp (with A).
• In manual mode you can switch
between output percent (with P)
and heater current to the closest
tenth of an amp (with A).
2.3.6 Change Setpoint or
Output
To change the setpoint (normal mode)
or output (manual mode): Press
DISPLAY until the setpoint or manual
mode output is on display. Press the or
▼ key until the displayed value has been
changed to the new value you want.
The output current value and normal mode
output percentage are read-only.
2.3.7 Start Boost
To start the boost: Press the BOOST
key. The LED above the BOOST key
lights. For the next 15 seconds (or until
you press the BOOST key again,
whichever is sooner), 20% is added to the
controller output (100% output maximum).
2.4 Manual Tuning
2.4.1 Usually Not Needed
Manual tuning is usually not necessary.
By default an RMB controller Autotunes
the first time it is powered up. If the
Autotune is not successful, the controller
will try to Autotune every time it is powered
up until Autotune is successful. Autotune
is then disabled automatically.
2.4.2 PID Control
With PID control the device modulates
output power by adjusting the output
power percentage within a proportional
band. Power is proportionally reduced as
the process temperature gets closer to the
setpoint temperature.
The derivative action affects the output
based on the rate of change of the
process value.
You can use the Pid menu to change the
Pb (proportional band) and rAtE
(derivative) values.
The integral action (reset) affects the out-
put based on the duration of the process
value’s variation from the setpoint. In the
Series RMC Hot Runner controllers, the
integral (reset) action is always equal to
five times the derivative (rate) action.
You can also use the Pid menu to
change the setting of the At.OP (Autotune
operation) parameter, which determines
when Autotuning is attempted.
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