Specifications

6
Series RMB Hot Runner Controller Instruction Manual
2.2 What Happens When
You Power Up the
Controller
Turn on the controller by pressing the “I”
end of the 16 A power switch on the front
panel. When an RMB controller is
powered up, it lights all segments of the
display briefly, then displays its firmware
level.
1
The sequence of controller actions that
follow and the state of the controller output
depend on:
• SW2-switch 1 setting–If SW2-switch
1 is ON (the default), the controller
does a CompuStep soft start if the
process value is less than or equal to
200°F (93°C). If SW2-switch 1 is
OFF, the controller does not do a soft
start at power up.
• PId (PID control) menu’s At.OP
(Autotune operation) parameter
value–If the value of At.OP the
default oncE (once) or EnA (always
enabled), Autotune is attempted.
You can stop soft start and Autotune by
pressing the MODE key repeatedly.
2.3 Operation Basics
2.3.1 See PV
To see the process value: Look at the
top line of the display for the PV. The top
line shows the PV, unless the controller
detects an error, or Autotune is active, or
you are in the Pid menu.
2.3.2 See if Output is On
To see if the output is on: Look at the
HEAT LED. It is on when the output is on.
2.3.3 Monitor for Alarms
To watch for process alarms: Look at
the red ALARM LED. If the process value
falls 30°F (17°C) below the setpoint or
increases to 30°F (17°C) above the set-
point, the ALARM LED lights. It stays lit as
long as the PV deviates from the setpoint
by at least 30°F (17°C).
2.3.4 Change Mode
To change the mode: Press MODE
repeatedly until the LED lights for the
mode you want. The modes are:
• normal (closed loop control) –
Controller uses the input value to cal
culate the output needed to maintain
the setpoint shown on the lower line.
• manual (open loop control) –
Controller output is the percent
shown on the lower line. Input is
ignored. Transfer from normal to
manual is “bumpless” when the
process value is within 9°F (5°C)
of the setpoint.
• standby – Standby output 0P
(zero percent) is on the lower line.
1
It is a good idea to make a note of the
firmware version number. If you phone for
technical support, you will be asked for this
version information, as well as for the
complete model number of the controller in
question.