Athena RMT Operators Guide

Athena RMT Operators Guide
Series RMT
Hot Runner Controller
Operator’s Guide
Littlefuse is a registered trademark of Littlefuse, Inc.
G is a registered trademark of the DME Corporation.
SafeChange™ is a trademark of Athena Controls, Inc.
Series RMT Hot Runner Controller Operator’s Guide
Precautions
Warning
Use of this equipment in a manner not specified by the
manufacturer may impair protection provided by the equipment.
In addition to presenting a potential fire hazard, high voltage and
high temperature can damage equipment and cause severe injury
or death. When installing or using this instrument, follow all
instructions carefully and use approved safety controls.
Hazardous potentials exist on components inside the mainframe
and controller. Always disconnect AC power to the mainframe
when servicing the controllers or the mainframe.
Because these temperature controls or associated equipment
may not always fail safe, an approved temperature and/or
pressure safety control should be used for safe operation.
The controller power switch must be in the “OFF” position before
you put a controller into an energized mainframe, or remove a
controller from an energized mainframe. If the mainframe
supports the SafeChange feature, enable SafeChange on the
controller to reduce the possibility of damage to the controller
when installing or removing a controller from the mainframe.
Controllers are shipped with the SafeChange feature disabled.
To determine whether the mainframe supports SafeChange and
to enable SafeChange, follow the instructions in Series RMT Hot
Runner Controller Setup and Operation Manual.
Turn off power to the controller before cleaning the exterior of
the controller.
Failure to observe these precautions can result in exposure to a
potentially lethal shock hazard.
Changing jumper settings and all wiring should be done by an
experienced technician. The controller and wiring should be
installed in accordance with national and local electrical codes.
To avoid serious personal injury and damage to equipment,
follow all warnings and cautions provided in the manual supplied
with the mainframe.
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Series RMT Hot Runner Controller Operator’s Guide
Caution
If a controller shows signs of having been damaged during shipping, do
not power up or install the controller. Save all packing materials and
report any damage to the carrier immediately.
When the controller is powered up, the output may be activated. Consider
the effects on your process before powering up the controller.
Do not locate this instrument where it may be subjected to excessive
shock, vibration, dirt, moisture, oil, or other liquids.
This is a Class A product. In domestic environment this product may
cause radio interference, in which case the user may be required to take
adequate measures.
Specified operating ambient temperature is 32 to 150 °F (0 to
65 °C).
Notes on CE EMC Compliance
This unit is compliant with the following standards when properly installed
into a grounded metal housing. EMC testing was conducted with a load of
1 amp and setpoint of 400 F.
EMC directive (89/336/EEC)
EN 50081-1 (1992 edition)
EN 50082-1 (1992 edition)
Low Voltage Directive (73/23/EEC)
EN 61010-1 (1992 edition, Amendments 1, 2, 3, 4 and 11)
For more detailed
cleaning instructions,
see the Series RMT Hot
Runner Controller Setup
and Operation Manual.
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Series RMT Hot Runner Controller Operator’s Guide
1.
Introduction
1.1 About This Guide
This manual contains instructions for
operating the Series RMT Hot Runner
controllers.
The orange soft start indicator (item 1 in
the photo on page 2) is on during soft start
in normal (auto) mode.
Instructions for setting up, maintaining,
and cleaning the controllers are in the
Series RMT Hot Runner Controller Setup
and Operation Manual.
1.2.4
Instructions for wiring, installing, and
troubleshooting the controllers are in the
manual supplied with the mainframe.
1.2 About the Controllers
1.2.1
Zones Controlled
Modes of Operation

closed loop (auto) mode – Output
is automatically calculated by
controller, based on the difference
between the setpoint and the
process value.
rises above the zone setpoint plus
the high alarm value (30 °F).
Loop Break Detection
When loop break detection has been
enabled during setup, the controller
monitors input change.
If the input value does not change within
five minutes while the controller is
operating in closed loop (auto) mode, the
controller goes to manual mode with 0%
output, which can then be adjusted. See
page 4 for error messages
Instructions for changing the mode,
setpoint, and output percentage are on
page 3.
Soft Start
for Heater Bake Out
All Series RMT Hot Runner controllers
support a soft start feature to extend the
life of the heaters and the molds.
1.2.6 Sensor Error
Monitoring
The controller can detect a reversed
sensor or open sensor. See page 4 for
error messages.
The soft start allows slow dissipation of
moisture in heaters by gradually applying
power to the heaters.
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
1.2.5
manual – You set the output
percentage.
1.2.3
falls below the zone setpoint
minus the low alarm value (30 °F),
or
While a zone is in alarm,  or  is also
displayed.
Series RMT controllers can operate in:


The alarm status indicator remains lit as
long as the process value deviates from
the setpoint by at least 30 °F (the
deviation alarm value).
An RMT is designed to control two
temperature zones.
1.2.2
Deviation Alarms
Each Series RMT Hot Runner controller
supports deviation alarms. A zone’s
orange ALARM LED (item 11 in the photo
on page 2) lights if the process value:
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Series RMT Hot Runner Controller Operator’s Guide
2.
Operation
2.1 RMT Front Panel
Because an RMT model can control two
zones, two sets of displays, keys, and
indicators are provided. Zone B can be
disabled; see the Series RMT Hot Runner
Controller Setup and Operation Manual
for details.
1 – soft start indicator – lit (orange)
when soft start is active
2 – output status indicator – lit
(orange) when output is on
3 – process value (PV) display
(orange)
4 – Celsius indicator – lit (green) when
PV and SP are displayed in degrees C
5 – output percentage indicator – lit
(green) when manual mode output %
is displayed on lower line
6 – Fahrenheit indicator – lit (green)
when PV and SP are displayed in
degrees F
7 – setpoint (SP) display (closed loop
mode) or output percent (manual
mode)
8 – up key – increases setpoint (closed
loop mode) or output percent (manual
mode); press and hold for rapid
change
9 – mode key – changes mode; active
indicated by lit LED (12–13)
10 – down key – decreases setpoint
(closed loop mode) or output percent
(manual mode); press and hold for
rapid change
11 – alarm indicator – lit (orange)
when zone PV varies from the SP by
the deviation alarm value (low or high)
12 – closed loop (normal) mode
indicator – lit when automatic control is
active
13 – manual mode indicator – lit
(green) when output percent can be
set by operator
14 – power switch
Power must be off when removing
or installing controller.
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Series RMT Hot Runner Controller Operator’s Guide
2.2 Operation Basics
2.2.1
2.3 What Happens When
You Power Up the
Controller
See PV
To see the process value: Look at the
top line of the display for the PV. The top
line shows the PV for the zone, unless the
controller detects an error. Error
messages are on page 4.
2.2.2
2.3.1
Turn on the controller by pressing the “I”
end of the 16 A power switch on the front
panel. When an RMT controller is
powered up, it displays its firmware level.
Next, all segments of the display and all
LED indicators light. The output remains
off.
See if Output is On
To see if the output is on: Look at the
Heat indicator above the PV for the zone.
This orange indicator is on when the
output is on.
2.2.3
2.3.2
Monitor for Alarms
This LED lights if the process value goes
above or below the zone setpoint by the
deviation alarm value (30 °F).
2.3.3
Watch Soft Start
A soft start is executed:
The alarm status indicator remains lit as
long as the process value deviates from
the setpoint by at least 30 °F.
While a zone is in alarm,  or  is also
displayed.
Change Mode

every time the controller starts
and the process value is less than
200 F (93 C), and

every time the controller is
returned to closed loop (auto)
operation and the PV is less than
200F (93 C).
To stop the soft start (not
recommended): Press the MODE key to
take the controller out of closed loop
(auto) mode. Press the MODE key again
to return the controller to closed loop
(auto) mode.
To change the mode: Press MODE to
light the LED for the mode you want.
2.2.5 Change Setpoint or
Output
To change the setpoint (closed loop
mode) or output (manual mode): Press
or key until the displayed value
the
has been changed to the new value you
want.
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Put Controller in
Closed Loop Mode
To put the controller into closed loop
mode: Push the MODE button. What
happens next depends on the process
value.
To watch for process alarms: Look at
the orange ALARM LED.
2.2.4
Turn on Controller
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Series RMT Hot Runner Controller Operator’s Guide
3.
Error Messages
3.1 Introduction
Usually the controller displays the process
variable on the top line and the setpoint on
the lower line of the display.
However, when the controller detects a
problem with the input messages are
displayed to alert you to conditions that
require your immediate attention.
3.2 Summary of Error Messages
If the controller detects a problem, an error message will be displayed. These messages
are summarized below.
top
line
display
Open Sensor
Detected
Loop Break
Detected
goes high first briefly
(see Note 1 below), then
goes low first (see Note 1
below), then after five
minutes
/
lower
line
display
output
alarm
LED
Reversed
Sensor Leads
Detected
goes low first (see Note 2
below), then
// changing

numerical values
(zero output %)
 / 
(zero output %)
off (0 %)
on while low, then off
(see Note 1)
on while low, then off
(see Note 2)
on
on
on
Note 1: At first, a falsely increasing process value is displayed on the top line; the setpoint remains on
display on the lower line, and the output remains on until the process value is greater than the setpoint.
Note 2: At first,  alternates with display of the decreasing process value on the top line; the setpoint
remains on display on the lower line, and the output remains on until the sensor error is detected.
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