Athena Controls RMB/12, RMB/6 Configuration And Operation Manual

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Athena

RMB/6 and RMB/12

Non-Modular Hot Runner

Controller

Configuration and Operation

Manual

Athena®, CompuStep

, and CompuCycle® are registered trademarks, and RMB/6™ and

RMB/12™ are trademarks of Athena Controls, Inc.

Precautions

Use of this equipment in a manner not specified by the manufacturer may

Warning

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 controller. Always disconnect AC power to the controller when servicing the controller.

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.

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.

Caution

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 hardware setup instructions.

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.

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 122 °F (0 to 50 °C).

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

Table of Contents

Precautions........................................................................................................... I

1. Introduction ............................................................................................... 1

1.1 About This Manual ................................................................................................1

1.2 Features and Benefits of RMB/6 and RMB/12 Controllers ...................................1

1.3 Model Number Breakdown ...................................................................................3

1.4 What Happens When You Power Up the Controller.............................................4

2. Setup Sequence ........................................................................................ 5

3. User Interface ............................................................................................ 8

3.1 Overview ...............................................................................................................8

3.2 Selecting One or All Zones .................................................................................10

3.3 Mode of Operation ..............................................................................................10

3.4 Changing the Setpoint ........................................................................................11

3.5 Changing a Configuration Parameter Value .......................................................11

3.6 Configuration Menus and Factory Settings.........................................................12

4. Alarms and Alarm Indication ................................................................. 14

4.1 Types of Alarms ..................................................................................................14

4.2 Alarm Indication ..................................................................................................14

4.3 Silencing Alarm Beep..........................................................................................14

4.4 External Indication ..............................................................................................14

4.5 Alarm Priorities....................................................................................................15

5. Parameter Characteristics...................................................................... 16

5.1 Introduction .........................................................................................................16

5.2 Input Parameters ................................................................................................16

5.3 Boost Parameters ...............................................................................................17

5.4 Control Parameters.............................................................................................18

5.5 Display Units .......................................................................................................20

5.6 Alarm Parameters ...............................................................................................21

5.7 Supervisor Parameters .......................................................................................22

6. Tuning the Controller for PID Control ................................................... 23

6.1 Introduction .........................................................................................................23

6.2 Procedure for Autotuning ....................................................................................23

6.3 Autotune Errors...................................................................................................25

6.4 Manual Tuning (Zeigler-Nichols PID Method).....................................................25

7. Restricting Access to Controller Functions ......................................... 27

8. Resetting Parameters to the Default Values......................................... 28

9. Index......................................................................................................... 29

Warranty............................................................................................................. 31

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

1. Introduction

1.1 About this Manual

This manual contains all the information needed to configure and operate the RMB/6 and RMB/12 Non-Modular Hot Runner controllers.

Wiring diagrams, mounting instructions, and other information about installing the hardware are on the installation diagrams shipped with the unit.

1.2 Features and Benefits of RMB/6 and RMB/12 Controllers

1.2.1 Multi-Zone Control with Convenient User Interface

A single RMB/6 Hot Runner controller can provide microprocessor-based control of up to six zones; a single RMB/12 Hot Runner controller can control up to twelve zones. Zones can be configured individually or all zones can be configured simultaneously.

During operation the front panel simultaneously displays the process value and setpoint for every zone. LEDs for each zone indicate the type of control (open or closed loop), output status, alarm status, boost status, and standby status. Buttons on the front panel make it easy to change the setpoint, mode, and configuration parameter values for one selected zone or all zones.

The front panel also has buttons to:

• start the boost for all zones,

• put all zones in Idle or all Idle zones in the Run state,

• silence the audible alarm.

When necessary, access to function buttons on the front panel can be restricted. See Section 7 for details.

RMB 6 Operating Display

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

RMB 12 Operating Display

1.2.2 PID Control with Autotuning

When an RMB/6 or RMB/12 zone is in Normal (closed loop) mode, Proportional-IntegralDerivative (PID) control is provided. The RMB/6 and RMB/12 Hot Runner controllers also support Manual (open loop) mode that overrides automatic control. In Manual mode you control the output by entering a fixed output percentage value. PID to manual is “bumpless” when the process value is within 9 °F (5 °C) of the setpoint.

Using PID control, the controller modulates output power by adjusting the output power percentage within a configurable proportional band. Power is proportionally reduced as the process temperature gets closer to the setpoint temperature.

A zone’s transfer from

The configurable derivative action affects the output based on the rate of change of the process value.

The integral action affects the output based on the duration of the process value’s variation from the setpoint. In the RMB/6 and RMB/12 Hot Runner controllers, the integral (reset) action is always equal to six times the configured derivative (rate) action.

An Autotune function is standard on every RMB/6 and RMB/12 Hot Runner controller. This feature for easy tuning of the proportional and derivative components of the control algorithm can be initiated every time the controller is powered up, once when the controller is set up regardless of success (and again by changing a parameter value), once only if successful (repeated at each power up until successful), or never. Instructions for tuning the controller automatically and manually are in Section 6.

1.2.3 CompuStep® Soft Start for Heater Bake Out

All RMB/6 and RMB/12 Hot Runner controllers support the CompuStep soft start feature, which allows slow dissipation of moisture in heaters by gradually applying power to the heaters. Using this feature helps extend the life of the heaters and the molds. When a soft start is executed, single cycle bursts start at 5% output power and step up the output 5% every 30 seconds.

• The soft start when the controller is in Normal (closed loop) mode lasts five minutes or until the process temperature reaches 200 °F (93 °C).

Use of a fixed output percentage is also possible under other circumstances. Configuration parameters let you specify a fixed output to be used as a failsafe action, a different fixed output percentage to be used in standby mode, and another fixed output percentage used during the boost function described in

1.2.4.

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

• The soft start when the controller is in Manual (open loop) mode continues until the output is the lower of 50% or the target Manual mode output percent.

By default, a soft start will be executed:

• every time the controller starts (after being taken out of Idle) and the process value is less than 200 °F (93 °C), and

• every time the controller is returned to Normal (automatic) operation and the PV is less than 200°F (93 °C).

1.2.4 Programmable Boost Function

Every RMB/6 and RMB/12 Hot Runner controller supports a boost function. For each zone you can use the Boost Config menu to configure a special setpoint (closed loop boost) or a special fixed output percentage (open loop boost) to be used when the boost

button

The boost function will remain active until:

is pressed.

• the configured boost duration time has expired, or

• you use the mode/enter button

expiration of the boost duration.

1.2.5 Process-Protection Features

Process-protection features are standard on all RMB/6 and RMB/12controllers. These features include:

• high and low deviation alarms

• high temperature safety limit

• loop break detection

• failsafe operation in case of sensor problems

1.2.6 Security

The RMB/6 and RMB/12 front panels include buttons that can be used to change the selected zone’s setpoint and mode, and to boost the output temporarily by a configurable amount. Users who know the Supervisor password can limit access to these buttons on the front panel, plus limit configuration access. (Units are shipped with password protection disabled.)

1.3 Model Number Breakdown

RMB6

RMB12

—

Communications

0 = None

—

Market

D = Domestic X = Export E = CE

to take a zone out of boost mode before the

—

Zone Count

06 = 6 12 = 12

—

Future

—

Options

Consult Factory

Consult factory for connector plate layout.

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

1.4 What Happens When You Power Up the Controller

When an RMB/6 or RMB/12 Hot Runner controller is powered up using the switch on the back, all LEDs and all elements in the LCD display light briefly, and then software versions (of the display and the controller hardware) are displayed.

At the conclusion of the startup process, the process values and setpoints for all zones are displayed. Only the green LED for the display unit of measure (Fahrenheit or Celsius) is lit.

All zone outputs will be off because the unit starts up with all zones in the Idle state.

Briefly pressing the run/idle button currently Idle in the Run state. (Pressing the button again for at least two seconds puts all zones in Idle.)

In each zone’s column of LEDs, the green LED in the closed loop row is lit to indicate the type of control.

The green LEDs in the output lit) or off. For more information about the user interface, see the Section 3.

When zones go into the Run state, the effect on each zone’s output depends on the value of the Startup Mode parameter configured using the Control Config menu. See 5.4 for details.

on the front of the case puts all zones that are

or open loop

row indicate whether the zones’ outputs are on (LED

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

2. Setup Sequence

The following list summarizes the configuration and startup tasks to be accomplished once the controllers are wired as shown on the diagrams shipped with the unit.

Information about all configuration parameters, including parameter interactions and valid ranges, is in Section 5.

Turn on the controller using the switch on the back (shown below). When the unit is

1) powered up, the controller goes through its startup sequence (see 1.4), and then the

cess value and setpoint for every zone (the standard operating display) are

pro shown. All zones will be Idle (all outputs off).

If the controller has already been wired to the sensors and heaters, do NOT push

the run/idle zones and entered custom setpoints. When zones are taken out of Idle, their

outputs may go on unless you change the default parameter values.

button on the front of the case until after you have configured the

2) Take unneeded zones out of service by setting them to Offline.

a) Select a zone by pressing the zone selection button

PV and SP are displayed. (Zone numbers are above the column of status LEDs for each zone.)

b) Access the mode-selection function by pressing the mode/enter button

c) Step through the possible modes by pressing the

“Offline” is displayed.

d) Exit the mode-selection function by pressing the menu-access/exit button

. A confirmation message will be displayed briefly and then the PV and

SP for the zone will be displayed as “OFF.”

3) Notice that the green F (for Fahrenheit) or C (for Celsius) LED is lit. This LED

indicates the unit of measure for the process values and setpoints displayed. Units ordered for the “Domestic Market” (see model number breakdown in subsection 1.3) are set to display temperatures in degrees Fahrenheit. Units

red for “Export” or “CE” are set to display temperatures in Celsius.

orde

If you want to change the unit of measure used for temperature displays:

a) With any zone selected, press and hold the menu-access/exit button

the name of a configuration menu is displayed.

b) Step through the menus by pressing

menu name is displayed.

repeatedly until the Display Config

until only that zone’s

button repeatedly until

until

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

c) To access the Display Units parameter, press . The currently selected

unit of measure will alternate with the parameter name on the lower line of

the display. Notice that an asterisk

is displayed instead of a zone number.

This asterisk indicates that the parameter applies to all zones.

d) Change the unit of measure by pressing

e) Exit the menu system by pressing and holding

or .

for several seconds. The PV and SP for all zones (except any offline zones) will be displayed in the selected unit of measure. Other temperature values previously entered while a different unit of measure was in use will be converted automatically.

4) If the factory settings listed in subsection 3.6 are not appropriate for your cation, you can change a parameter value for one or all zones.

appli

a) To select one zone, press

repeatedly until only that zone’s PV and SP

are displayed.

To select all zones, press

repeatedly until the PV and SP for all zones are displayed with asterisks between the PV and SP for Zones 3 and 4 (s below) on an RMB/6 unit. (On an RMB/12 unit, asterisks will also be displayed between the PV and SP for Zones 9 and 10.)

b) Press and hold

c) Step through the menus by pressing

to enter the menu system.

repeatedly until the name of the

menu you want is displayed.

d) Step through the menu items by pressing

until the parameter you want is

displayed, alternating with its current value.

e) Change the value by pressing

or . When changing a numerical

value, you can hold down an arrow button for fast changes.

f) Exit the menu system by pressing and holding

for several seconds.

Note that the default High [Temperature] Safety [Limit] (a Supervisor parameter) is Off by default. If you want the controller to turn off the output to a zone that exceeds the high limit, change the value of the High Safety parameter.

5) RMB/6 and RMB/12 units are shipped with the Supervisor password set to 100, which disables password protection. If you want to limit access to the Superv [Supervisor] Config menu, change the Supervisor password from the default 100. As long as the password is 100, no password will be required to access all functions (except settings on the Factory Config menu).

6) Change Normal mode (closed loop) setpoints or Manual mode (open loop) output

percentage by selecting a zone, and then pressing

or to change the setpoint or output percent. A few seconds after you stop pressing an arrow button, the main display (PV and SP) will return.

Tip: If all zones are in the same mode (Normal or Manual), you can select all

The Factory Configuration password is available only from Athena Technical Support.

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

zones as described above, and then change the setpoint temperature or manual mode output percentage for all zones simultaneously.

8) Autotune all zones that will operate in Normal (closed loop) mode; see Section 6. Whe

n Autotuning has been completed successfully for all Normal zones, the controller is ready to use. The appropriate green status LED in the column of LEDs for each zone will be lit:

for Normal (open loop)

for Manual (closed loop)

for Standby

If the zone is configured to start up in Idle after the run/idle button

has been

pressed, no status LED will be lit.

Whenever a zone’s output is on, its green output

LED is lit.

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

3. User Interface

3.1 Overview

During operation, the front panel contains a two-line display that displays the PV (process value) and SP (Normal (closed loop) mode setpoint or Manual (open loop) mode output percentage) for each zone during normal operation. Zone numbers are under the display. PV and SP values are displayed in the unit of measure (degrees F or degrees C) indicated by the lit green “F” or “C” LED.

This display can also be used to view and change controller settings as described in subsection 3.5. Parameters are grouped into menus. An overview of the menus is in

ubsection 3.6

If a zone is in priorities are listed in 4.5.

alarm, an alarm code alternates with the SP value. Alarm codes and

RMB/6 Operating Display

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RMB/12 Operating Display

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

A column of LEDs for each zone indicates statuses for the zone and its output. The rows of LEDs are:

output: lit green when the zone’s output is on

boost: lit green when the zone is in Boost mode

closed loop: lit green when the zone is in a closed

loop mode, such as Normal, Closed Loop Boost, Normal Soft Start, etc.

open loop: lit green when the zone is in an open loop mode, such as Manual or Open Loop Boost

standby: lit green when the zone is in Standby mode or Hardware Standby mode

alarm: flashes red when the zone is in alarm (more information about alarm indication is in 4.2)

Symbols on LED Rows

Buttons provide access to all controller functions. The purposes of the buttons are shown below.

The Superv [Supervisor] Config menu can be used to disable the boost and mode buttons, and to prevent operators from changing the setpoint or configuration parameter values. If you cannot make changes you need, talk to your supervisor.

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Button Functions

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

3.2 Selecting One or All Zones

To select one zone, press repeatedly until only that zone’s PV and SP are displayed.

To select all zones, press with asterisks between the PV and SP for Zones 3 and 4 (see below) on an RMB/6, and between Zones 3 and 4, and Zones 9 and 10 on an RMB/12.

repeatedly until the PV and SP for all zones are displayed

3.3 Mode of Operation

3.3.1 Viewing Current Mode

The current mode of all zones and their output percentages can be displayed by briefly

pressing the menu-access/exit button in the next subsection.

3.3.2 Mode Indicators

In addition to indicators for the selectable modes (see 3.3.3 and 3.3.4), additional mode indicators are displayed under special circumstances, such as when Autotune or soft start is active.

. Mode indicators and their meanings are listed

The mode indicators are:

HSB = hardware standby (external signal put whole controller on standby) NRM = Normal (closed loop) NTU = Normal auto tuning (Autotuning in process) NSS = Normal soft start—Gradual warming if the process value is less than the lower of

the setpoint or 200 degrees F (93 degrees C) NRB = Normal mode boost (using configured boost setpoint) MAN = manual (open loop) MAB = manual mode boost (using configured boost percentage) SBY = standby (using configured standby setpoint in Normal mode or fixed output

percent in Manual mode) SSS = standby soft start—If zone is set to start up in Standby, it will gradually warm to

the Standby setpoint if process value is less than the lower of the Standby setpoint or 200 degrees F (93 degrees C).

IDL = idle (no output) FSF = failsafe (in state configured using Superv [Supervisor] menu) OFF = offline (unused zone)

3.3.3 Changing Mode

To change mode of operation:

1) Select one zone or all zones as described above.

2) Access the mode-selection function by pressing

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

3) Step through the selectable modes (see below) by pressing the button repeatedly until the mode you want is displayed.

4) Confirm the selection and exit the mode-selection function by pressing confirmation message will be displayed briefly, and then the normal operating display returns.

3.3.4 Modes Available for Selection

The modes available for selection are:

Normal—zone uses closed-loop PID automatic control based on the entered SP and measured PV

Standby—zone uses Standby Setpoint or Standby Percentage as configured using the Control Config menu.

Manual—zone uses open-loop control; you set output percentage

Boost—for the configured Boost Duration time, the zone uses the Boost Setpoint or

Boost Percentage configured with Boost Config menu.

Idle—zone’s output is off until another mode is selected using the front panel — OR —

is pressed to put all Idle zones in the Run state

Offline—zone’s output is off and PV is not monitored by the controller

3.4 Changing the Setpoint

To change Normal mode (closed loop) setpoint or Manual mode (open loop) output percentage:

. A

1) Select a zone or, if all zones are in the same mode (Normal or Manual), select all zones as described in subsection 3.2.

2) Press

or to change the setpoint or output percent.4 A few seconds after you

stop pressing an arrow button, the main display (PV and SP) will return.

3.5 Changing a Configuration Parameter Value

To view and change parameter values:

1) Select one zone or all zones as described in subsection 3.2.

Press and hold

3) Step through the menus by pressing want is displayed. Notice that if you selected all zones before entering the menu system (or if the parameter, such as Display Units, applies to all zones), an asterisk

is displayed instead of a zone number. This asterisk indicates that the change will

apply to all zones.

to enter the menu system.

repeatedly until the name of the menu you

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

4) Step through the menu items by pressing until the parameter you want is displayed, alternating with its current value.

5) Change the value by pressing

or . When changing a numerical value, you

can hold down an arrow button for fast changes.

To change the value of this parameter for a different zone, press

repeatedly until the

number of the zone you want is displayed.

To change a different parameter for the selected zone, repeat steps 3 through 5 as needed.

To leave the menu system, press and hold

for several seconds.

3.6 Configuration Menus and Factory Settings

The table below shows all configuration menus, the parameters in each menu, and the factory settings.

At the factory, all zones’ settings are identical.

When a parameter is accessed, the display of its name alternates with the display of its current value.

Menu Parameters Factory Setting

Input

Config

Information about each parameter is in Section 5.

Bias 0 degrees

Low Setpoint Limit 32 degrees F (0 degrees C)

High Setpoint Limit 999 degrees F (537 degrees C)

Input Type depends on input type specified when the

unit was ordered

Boost

Config

Control

Config

Boost Type (applies only to zones running in Normal mode; zones running in Manual mode always use Boost Percentage; see below)

Boost Duration Boost Off

Boost Setpoint 77 degrees F (25 degrees C)

Boost Percentage 0

Standby Type Open Loop

Standby Setpoint 77 degrees F (25 degrees C)

Standby Percentage 0

Proportional Band 24

Derivative [PID rate] 7 seconds

PID Autotune (when it will be performed)

closed loop

once at next power-up, and then disabled, even if tuning was not successful

A password-protected Factory menu is also available. The password is available only from the Athena

technical support team.

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

Menu Parameters Factory Setting

Display

Config

Alarm

Config

Superv.

Config

[Supervisor]

Startup Mode (when zone is taken out of Idle with run/idle button

)

Display Units

Last Active Mode (most recent operating mode)

Degrees F if “D” is “Market” choice in model number Degrees C if “X” or “CE” is “Market” choice in model number (see 1.3)

ies to all zones

Appl

Inhibit Seconds 0 (off)

High Dev Setpoint [High Deviation] 30 degrees F (17 degrees C)

Low Dev Setpoint [Low Deviation] 30 degrees F (17 degrees C)

Alarm Silence Seconds 120 seconds—applies to all zones

Set Superv. Password 100 = OFF (password protection

disabled)—applies to all zones

Fail Safe Action Auto Average (use a calculated output

value based on output values that have typically successfully maintained the current setpoint for your process in the past; if no history of Normal mode operation, then output is set to zero)— applies to selected zone

Low Reading

High Reading

not applicable

High [Temperature] Safety [Limit] OFF—applies to selected zone

Fail Safe FOP [Fixed Output Percent] 0 %—applies to selected zone

Loop Break Time 300 seconds—applies to selected zone

Soft Start (CompuStep warming)

gradual

Enable—applies to all zones that are in Normal (closed loop) mode

Mode Key Enable Enable—applies to all zones

Boost Key Enable Enable—applies to all zones

SP [Setpoint] Change Enable Enable—applies to all zones

Config. Enable Enable—applies to all zones

Reset PID Parameters No—applies to selected zone

Load Defaults No—applies to selected zone (but all zones

must be in Idle; changes take effect after power has been cycled)

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

4. Alarms and Alarm Indication

4.1 Types of Alarms

The RMB/6 and RMB/12 Hot Runner controllers support high and low deviation alarms, configurable separately for each zone (see subsection 5.6). The unit also recognizes

cess problems (such as loop break, reversed and open sensors, and process

pro temperature exceeding configured safety limit) and problems with its own operation.

4.2 Alarm Indication

When a zone is in alarm:

• its red alarm detected, but the problem does not affect operation now. For example, a zone’s red alarm LED flashes slowly if an open thermocouple is detected, but the zone is operating in Manual mode (in which no sensor value is used by the controller to calculate the output)

• the alarm relay closes

• a code for the type of alarm alternates with display of the setpoint (Normal

mode or other closed-loop mode such as closed-loop boost) or output percentage (Manual mode or other open-loop mode such as open-loop standby); and

• unit beeps until the alarm condition is cleared or the zone is put in Idle mode or the alarm is silenced (see below).

LED flashes rapidly (Slow flashes mean an alarm was

4.3 Silencing Alarm Beep

You can temporarily silence the alarm beep by pressing the alarm silence button .

Beeping will be silenced for the configured number of seconds. (The default is 120 seconds.)

4.4 External Indication

An output on the back of the controller allows external devices (such as horns or lights) to be connected to the controller for alarm annunciation. For more information about this feature, see the diagrams shipped with the controller.

This alarm output is not affected when the alarm silence button controller is pressed.

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on the front of the

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

4.5 Alarm Priorities

If a zone has more than one alarm condition, the code for the highest-priority alarm is displayed. Alarm priorities are in the table below.

Alarm Display Priorities

Priority Code Condition

OVt internal over-temperature all outputs off turn off controller; make sure fan

ER1

ER2

TCr reversed thermocouple

SAF high-temperature safety

TCo open thermocouple

LPB loop break detected zone output off

HID high deviation alarm zone output off

LOD low deviation alarm zone output on

Tu0 Tu3 Tu5 Tu8 Tu9

problem with controller’s

internal operation

detected

limit exceeded (configured in Superv. Config menu; default is feature disabled)

detected

Autotuning error zone output off

Controller Response

all outputs off cycle power to controller; if error

zone goes to configured failsafe state

zone output off if feature is enabled

zone goes to configured failsafe state (configured in Superv. Config menu)

How Alarm Is Cleared

and vents are not blocked; wait for controller to cool; turn on controller; if error recurs, contact technical support

recurs, contact technical support

use Idle as described in 3.3.3, and then after probl Normal (closed loop) or Manual (open loop) mode

clears automatically when alarm condition clears

use Idle as described in 3.3.3, and then after probl again

For more information about tuning and Autotuning errors, see Section

button to put the zone in

em is fixed, put zone in

button to put the zone in

em is fixed, try tuning

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

5. Parameter Characteristics

5.1 Introduction

This section contains information about every configuration parameter, including valid ranges, control mode(s) to which the parameter applies, and interactions among parameters.

For an overview of configuration menus and parameters, see subsection 3.6.

5.2 Input Parameters

5.2.1 Introduction

You can use the Input Config menu to specify for the selected zone(s):

• bias (if any) to be applied to the input,

• setpoint range, and

• input type

5.2.2 Input Parameters and Settings

Applies to

Name

Control

All Zones

Selected Zones

Bias

Low Setpoint Limit X X

High Setpoint Limit X X

Input Type X X X J Thermo

X X X

Closed Loop

Range/

Choices

Control

Open Loop

–100 to 100 °F –55 to 55 °C

32 to 999 °F 0 to 537 °C

K Thermo

Default Description & Interactions

zero degrees

32 °F 0 °C

999 °F 537 °C

input type specified when unit was ordered

number of degrees that will be added to or subtracted from the measured process value before it is displayed

lowest and highest values that can be entered as setpoint (before bias is applied); also limits configurable range of boost setpoint and standby setpoint

switching to input type that does not match the type specified when the unit was ordered can cause small errors (1–5 degrees) in temperature measurements

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RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

5.3 Boost Parameters

5.3.1 Introduction

A boost button is on the RMB/6 and RMB/12 front panel. When you press , the output of a zones will be increased temporarily.

You can use the Boost Config menu to specify:

• whether the boost function will be closed loop (based on a setpoint) or open loop (based on a specified output percent)

• boost setpoint and duration for closed loop boost

• boost output percentage and duration for open loop boost

5.3.2 Boost Parameters and Settings

Applies to

Name

Control

All Zones

Selected Zones

Boost Type

Boost Duration

Boost Setpoint X X

Boost Percentage X X 0 to 100 % 0 (off) output percent used in Open Loop boost

X X Open Loop

X X X Boost Off

Closed Loop

Range/

Choices

Control

Open Loop

Closed Loop

15 seconds 30 seconds 45 seconds 60 seconds 75 seconds 90 seconds 105 seconds 120 seconds

Low Setpoint Limit to High Setpoint Limit (from Input Config menu)

Default Description & Interactions

Closed Loop

Boost Off length of boost

77 °F 25 °C

type of control used after applies only to zones running in Normal mode; zones running in Manual mode always use Closed Loop boost

setpoint used in Closed Loop boost

is pressed;

900M243U00 © Athena Controls, Inc. 17

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

5.4 Control Parameters

5.4.1 Introduction

You can use the Control Config menu to specify how the selected zone(s) will be controlled:

• at startup (after you have pressed the run/idle button

to take the controller

out of Idle),

• during Normal operation,

• when the

button has been used to put the zone in Standby or when a zone

configured to start up in Standby mode comes out of Idle, and

• when an external signal has been used to put the whole controller in Hardware Standby.

The Control Config menu is also used to specify whether and how often Autotuning (described in Section 6) is done.

5.4.2 Control Parameters and Settings

Applies to

Name

Control

All Zones

Selected Zones

Standby Type

Standby Setpoint

Standby Percentage X X 0 to 100 % zero output percent used when zone is in

Proportional Band

Derivative (rate) X X 0.0 to 999

X X X Open Loop

X X

Closed Loop

Range/

Choices

Control

Open Loop

Closed Loop

Low Setpoint Limit to High Setpoint Limit (from Input Config menu)

1 to 999 °F 1 to 537 °C

seconds

Default Description & Interactions

Open Loop

77 °F 25 °C

24 °F 13 °C

7 seconds

type of control used while the controller’s front panel buttons have been used to put the selected zone(s) in standby mode: closed loop (Standby Setpoint used) or open loop (Standby Percentage used)

Note: When an external signal puts all zones in Hardware Standby mode, this Standby Type value is ignored. If a zone is closed-loop when the Hardware Standby signal is received, the configured Standby Setpoint is used. If a zone is open-loop when the Hardware Standby signal is received, the configured Standby Percentage is used.

setpoint used when zone is in closed loop standby mode

open loop standby mode

width of the band below the setpoint within which the controller will modulate the output as the process value approaches the setpoint; Autotuning sets this value automatically; see Section 6

time period used by the derivative component of the control algorithm when analyzing load changes; Autotuning sets this value automatically; see Section 6

18 © Athena Controls, Inc. 900M243U00

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

Applies to

Name

PID Autotune

Control

All Zones

Selected Zones

Closed Loop

X X Disable

Range/

Choices

Control

Open Loop

Once (then

disabled after successful Autotune)

Enable (Autotunes every time controller is powered up)

One Try Only (and

then disabled, even if Autotune was not successful)

Startup Mode X X X Auto

(Normal closed loop)

Standby Manual

(open loop) Idle

(remains in

Idle after is pushed to set controller to Run state)

Last Active Mode

(same mode as last time controller was running)

Default Description & Interactions

The integral action for PID control is not configurable; the integral (reset) action is always equal to six times the configured derivative (rate) action.

One Try Only

whether and when Autotune should be done

mode used for the zone when the

controller goes from Idle to Run

(because operator pushed

on the

front of the case)

900M243U00 © Athena Controls, Inc. 19

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

5.5 Display Units

5.5.1 Introduction

On the front panel the lit green LED labeled F or C indicates the units of measure for the process values and setpoints displayed.

Units ordered for the “Domestic Market” (“D” as the “Market” character in the model number on the tag on the case) are set to display temperatures in Fahrenheit. Units ordered for “Export” (“X” as the “Market” character) or “CE” (“CE” as “Market” characters; see model number breakdown in 1.3) are set to display temperatures in Celsius.

You can u

se the Display Config menu to change the unit of measure used for displayed

temperatures.

5.5.2 Display Parameter and Settings

Applies to

Name

Display Units

Control

All Zones

Selected Zones

X X X Degrees F

Closed Loop

Range/

Choices

Control

Open Loop

Degrees C

Default Description & Interactions

Degrees F unit of measure used for all zones for

all displayed temperatures, including parameter values; changing Display Units causes all temperatures already entered as parameter values or setpoints to be converted to the newly selected unit of measure when displayed

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

5.6 Alarm Parameters

5.6.1 Introduction

High and low deviation alarms are supported for each zone. (Section 4 contains information about alarm indication and effects on outputs.)

You can use the Alarm Config menu to specify for the selected zone(s):

• how many seconds after zone is taken out of Idle the controller should wait before indicating a low alarm (Alarm Inhibit)

• number of degrees the process value must exceed the setpoint before the zone goes into alarm (High Deviation)

• number of degrees the process value must fall short of the setpoint before the zone goes into alarm (Low Deviation)

• the number of seconds the audible alarm on the RMB/6 or RMB/12 unit will be

silenced when to ALL zones in alarm.

5.6.2 Alarm Parameters and Settings

(on the front of the controller’s case) is pressed; this value applies

Applies to

Name

Control

All Zones

Selected Zones

Inhibit Seconds

High Dev Setpoint X X X

Low Dev Setpoint X X X

Alarm Silence Seconds X X X

X X X 0 to 999

Control

Open Loop

Closed Loop

Range/

Choices

seconds

1 to 999 °F 1 to 537 °C

0 to 600 seconds

Default Description & Interactions

0 (off) number of seconds the controller should

30 °F 17 °C

120 seconds

wait after zone is taken out of Idle before signaling a low alarm

number of degrees the process value must exceed the setpoint to trigger the alarm state

number of degrees the process value must fall below the setpoint to trigger the alarm state

number of seconds the audible alarm on

the controller will be silenced when is pressed.

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

5.7 Supervisor Parameters

5.7.1 Introduction

You can use the Superv [Supervisor] Config menu to specify the values of several parameters related to process protection for the selected zones. You can also use this menu to set up parameters that apply to the whole controller.

The Superv Config menu can be password protected. RMB/6 and RMB/12 controllers are shipped with the Supervisor password set to 100, which disables this feature. You can use this menu to specify a different password. Only users who know your new threedigit password will be able to view and change parameters in the Superv Config menu.

5.7.2 Supervisor Parameters and Settings

Applies to

Name

Control

All Zones

Selected Zones

Set Superv. Password X X X 100 to 999 100 = Off password needed to access parameters in

Fail Safe Action

Low Reading X X X — —

High Reading X X X — —

High Safety (High

Temperature Safety Limit)

Fail Safe FOP (fixed output percentage)

Loop Break Time (sec.) X X X OFF

Soft Start X X Disable

Mode Key Enable X X X Disable

Boost Key Enable X X X Disable

SP Change Enable X X X Disable

Config. Enable X X X Disable

Reset PID Parameters X X Yes

Load Defaults X X X Yes

X X X Off

X X X

X X 0 to 100% 0 % output percent used only if open or

Closed Loop

Range/

Choices

Control

Open Loop

Auto Average

Fixed Output Pct.

33 to 999 °F 1 to 537 °C

10 to 999 seconds

Enable

Default Description & Interactions

Superv [Supervisor] Config menu

Auto Average

OFF output will be turned off if process value

300 seconds

Enable gradual increase of output to slowly

Enable

Enable enables/disables use of front panel

No return tuning parameters to their default

No return configuration parameter values to

output action to be used when controller detects an open or reversed sensor: off, automatically calculated based on past good output values (if no history of Normal mode output values, then zero), or failsafe fixed output percent

lowest process value for selected zone since the last time the reading was reset by pressing the up or down arrow button

highest process value for selected zone since the last time the reading was reset by pressing the up or down arrow button

reaches this temperature

reversed sensor is detected and Fail Safe Action is set to Fixed Output Pct.

time period during which the input should change 1% of supported sensor span (9.67 °F or 5.37 °C) in response to output action if the sensor is working correctly and the input wiring is intact

dissipate moisture in heaters; see 1.2.3

enables/disables

buttons to change Normal mode setpoint and Manual mode output percentage

buttons to change configuration parameter values

settings, undoing Autotuning or manual tuning

their default settings as described in 8

button

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

6. Tuning the Controller for PID Control

6.1 Introduction

RMB/6 and RMB/12 Hot Runner Controllers support automatic tuning for control of zones running in CompuCycle

By default, every RMB/6 and RMB/12 controller is configured to execute the Autotune operation the first time it is powered up, then to disable the Autotune feature, even if Autotune was not successful.

The Autotune operation overwrites any existing proportional band and derivative (rate) parameter values that were previously configured.

All RMB/6 and RMB/12 controllers in a single process should be Autotuned simultaneously, so that interactions between zones during tuning parallel the interactions expected while the controllers are in use.

Normal (closed loop) mode.

6.2 Procedure for Autotuning

To Autotune:

1) Make sure the controller is in Idle state (only the green F or C LED lit).

2) After configuring any parameters that you want to change from the defaults, enter a setpoint that is representative of the setpoint you expect to use when the selected zones are in Normal mode operation.

3) If Autotuning has been attempted in the past, the Autotune feature may be disabled. To force an Autotune operation, use the Control Config menu to set the PID Autotune parameter to Enable.

4) Cycle the power to the controller.

5) At this point the controller may execute a CompuStep soft start.

• If you want the soft start to continue to its normal conclusion

(recommended), do not press any buttons.

• If you want to terminate the soft start (not recommended), use the mode

button

to set the selected zones’ mode to Normal.

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

During the Autotune operation, the display for the selected zones blinks “Tun.” Unless you want to terminate the Autotune by changing a zone’s mode, do not press any buttons during the Autotune operation. The lower line will continue to display the setpoint you entered in Step 2.

When the controller has completed Autotuning a zone successfully, the controller will save the tuning parameter values in the Proportional Band and Derivative (rate) parameters for all zones that have Autotuned successfully. (The new tuning values can be viewed using the Control Config menu.)

If Autotune was unsuccessful for a zone, the zone will:

• use default values for PID parameters,

• go into alarm (red LED lit in the

row),

• display its process value alternating with one of the tuning error codes listed

in 6.3, and

go to configured failsafe state; the effect on a zone’s output depends on

•

how you configured the Fail Safe Action parameter in the Superv [Supervisor] Config menu.

To clear the error display and put the zone(s) in standby mode, use the mode button

. (The effect on each zone’s output depends on the standby configuration

selections you made using the Control Config menu.)

Fix the problem (see error code meanings in next subsection) and try tuning again.

Once Autotune has been completed successfully for all Normal zones (“NRM” mode displayed) use the Control Config menu to disable PID Autotune.

RMB/6 Hot Runner Controller Configuration and Operation Manual

6.3 Autotune Errors

The Autotune error codes are in the table below.

Error Code Description

Tu3

Tu5

Tu8

Tu9

Tun0

Setpoint is lower than the process value. Look at the setpoint. If it is realistic for your process, then check the thermocouple leads; maybe they are reversed.

The initial process value and the setpoint are not far enough apart. For Autotune to work, the difference must be at least 9 degrees F (5 degrees C).

The startup curve (change in PV) was not acceptable to the Autotune algorithm. This problem could be caused by a process upset that occurred during tuning. Try Autotuning again when the process is stable. If the error recurs, your process is not suitable for Autotuning. Use manual tuning as described in 6.4.

The Autotuning timed out, because the process was unresponsive (or extremely slow to respond). Your process is not suitable for Autotuning. Tune the controller manually as described in 6.4.

The Autotune operation failed for a reason other than those listed above. Try Autotuning again when the process is stable.

6.4 Manual Tuning (Zeigler-Nichols PID Method)

6.4.1 Introduction

This tuning method may be used if the spread between initial process temperature and process operating temperature is small, or if the process is too slow for Autotuning. Manual tuning requires that zones be tuned one at a time and that the PV be tracked over time. (Graph the displayed PV against time manually.) All zones should be running while manually tuning one zone.

After you have finished manual tuning, you can change the Startup Mode parameter setting and enable soft start (recommended).

6.4.2 Procedure

To do manual tuning:

1) After configuring any parameters that apply to your control strategy, enter a setpoint that is representative of the setpoint you expect to use when the selected zone is in Normal operation.

2) Go to the Control Config menu.

3) For now, leave the Proportional Band set to 24 °F (13 °C), but change the Derivative (PID rate) to 0 seconds.

4) In the Control Config menu, set the PID Autotune parameter to Disable.

5) Return to the standard operating display and watch the behavior of the displayed process value. When the temperature reaches setpoint, plot a graph of the displayed process value against time or record the time period between temperature peaks. (Be patient. It may be several minutes before you see up and down changes (oscillation) in the process value for a manifold zone.)

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

6) If the temperature (process value) will not oscillate, then decrease the proportional band value by repeatedly halving the value (dividing it by 2) until a small, sustained temperature oscillation is seen.

Alternatively, if the temperature (process value) oscillates severely, double the proportional band value (multiple it by 2) repeatedly until a small, sustained temperature oscillation is observed.

7) Measure the period in seconds of one cycle of oscillation (“T” on the diagram below).

8) Divide the period of oscillation (T) by 8. The resulting number (quotient) is the correct Derivative parameter value (rate) time in seconds.

9) Access the Control Config menu and enter the Derivative value obtained in Step 8. The integral time will be set automatically to 6 times the rate. (You cannot view the integral term value.)

10) If the process is stable, manual tuning is completed. However, if slight oscillation is observed, multiply the current proportional band value by 1.66 and enter the product as the new PID Proportional Band value to complete the tuning procedure for this zone.

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

7. Restricting Access to Controller Functions

7.1 Introduction

If you have access to the Superv [Supervisor] Config menu, you can disable any of the

following: the soft start feature (not recommended), boost button use of the front-panel buttons to change setpoints or configuration parameters.

7.2 Procedure

To disable/enable a button or function:

, mode button ,

1) Select any zone by pressing

2) Access the menu system by pressing

press

3) Step through the parameters by pressing function you want to disable is displayed.

4) Choose “Disable” or “Enable” by pressing

5) Exit the menu system by pressing and holding display (PV and SP) is displayed.

repeatedly until the name of the Superv Config menu is displayed.

until a menu name is displayed, and then

repeatedly until the name of the

or .

until the standard operating

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

8. Resetting Parameters to the Default Values

8.1 Introduction

Using this function returns all configuration parameter values for the selected zone(s) to their defaults (shown in Section 5). The setpoints for the selected zone(s) will be

nged to 77 degrees F (25 degrees C).

cha

Reloading defaults never affects the following settings that apply to the whole controller: display units, input type. These settings that apply to the whole controller are not reset, even if all zones are selected before loading defaults.

When all zones have been selected for resetting defaults, some settings that apply to the whole controller WILL be reset to the defaults shown in shown in Section 5. These values that are retu 100, disabling password protection) and access control settings described in Section 7.

rned to the defaults include the Supervisor password (which will be reset to

After loading resume operation.

defaults, you will need to cycle power to the controller before you can

8.2 Procedure

To load defaults to selected zones:

1) Put the controller in the Idle state by pressing whole controller is in the Idle state, only the green F or C LED will be lit.)

2) Select the zone for which you want to load defaults by pressing

zone’s SP and PV are displayed. Alternatively, select all zones by pressing all zones’ SP and PV are displayed with asterisks

3 and 4 (RMB/6), or between 3 and 4, and 9 and 10 (RMB/12).

2) Access the menu system by pressing

press

3) Step through the parameters by pressing displayed.

4) Choose “Yes” by pressing

5) Exit the menu system by pressing and holding displayed.

repeatedly until the name of the Superv Config menu is displayed.

for at least two seconds. (When the

until only that

until

between the values for zones

until a menu name is displayed, and then

repeatedly until Load Defaults is

or .

until “Power Cycle the System” is

6) Cycle power to the controller. When powered up, the controller will use the default settings for the zone(s) selected in step 2.

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

9. Index

access control, 27, 28 alarm code displayed, 14 Alarm Config menu, 13, 21 alarm indication, 14 alarm LED, 14 alarm outputs, 14 alarm priorities, 15 alarm silence button, 9, 14 Alarm Silence Seconds parameter, 13, 21 auto reset, 26 Auto Tuning mode, 10 Autotune errors, 15, 25 Autotuning, 23

Bias parameter, 12, 16 boost button, 9, 27 Boost Config menu, 12, 17 Boost Duration parameter, 12, 17 boost function, 3 Boost Key Enable parameter, 13, 22 Boost mode, 10 Boost Percentage parameter, 12, 17 Boost Setpoint parameter, 12, 16, 17 Boost Type parameter, 12, 17 bumpless transfer, 2 button functions, 9

Celsius, 5, 8, 13, 20 changing Manual mode output percent, 11 changing parameter values, 11 changing setpoint, 11 CompuStep Config Enable parameter, 13, 22 Control Config menu, 12

soft start, 2, 22

default settings (factory), 12 default settings, resetting to, 28 default values, restoring, 28 Derivative parameter, 12, 18, 24, 25 derivative, resetting, 22 deviation alarms. See alarm Display Units, 13, 20, 28

ER1 alarm, 15 ER2 alarm, 15

Factory menu, 12 Factory password, 6 factory settings, 12 Fahrenheit, 5, 8, 13, 20 Fail Safe Action parameter, 13, 22 Fail Safe FOP parameter, 13, 22 failsafe state, 10, 13, 24 FSF mode indicator, 10

hardware installation instructions, where to find, 1 Hardware Standby mode, 10, 18 HID alarm, 15 High Dev Setpoint parameter, 13, 21 high deviation alarm message, 15 High Reading parameter, 13, 22 High Safety parameter, 6, 13, 15, 22 High Setpoint Limit parameter, 12, 16 high temperature safety limit. See High Safety

parameter

highest process value, 13, 22

IDL mode indicator, 10 Inhibit Seconds parameter, 13, 21 inhibiting alarms, 13, 21 input bias, 16 Input Config menu, 12 Input Config parameters, 16 input failure, 22 Input Type parameter, 12, 16, 28 installation instructions, where to find, 1 integral action, 18, 26

keypad functions, 9

LEDs, 9 Line Freq. parameter, 28 Load Defaults parameter, 13, 22 loading default values, 22 LOD alarm, 15 loop break detected, 15 Loop Break Time parameter, 13, 22 Low Dev Setpoint parameter, 13, 21 low deviation alarm message, 15 Low Reading parameter, 13, 22 Low Setpoint Limit parameter, 12, 16 lowest process value, 13, 22 LPB alarm, 15

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

MAN mode indicator, 10 Manual mode, 2, 10 Manual Mode Boost, 10 manual tuning procedure, 25 manual tuning, when required, 25 menu button, 9 mode button, 9, 27 Mode Key Enable parameter, 13, 22 modes of operation, 10

Normal mode, 2, 10 Normal Mode Boost, 10 Normal Soft Start mode, 10 NRB mode indicator, 10 NRM mode indicator, 10, 24 NSS mode indicator, 10 NTU mode indicator, 10, 24

OFF mode indicator, 10 offline zones, 5, 10 open thermocouple detected, 15, 22 operating modes, 10 output failsafe value, 22 output percents, displaying, 10 outputs, state on power up, 4 OVt alarm, 15

parameter values, changing, 11 password. See Supervisor password and Factory

password PID Autotune parameter, 12, 19, 23, 24, 25 PID tuning parameters, 22, 24 power switch, 5 powering up controller, 4 process value, highest, 13, 22 process value, lowest, 13, 22 Proportional Band parameter, 12, 18, 25, 26 proportional band, resetting, 22 Proportional-Integral-Derivativel. See PID

SAF alarm, 15 safety information, I security access, 3 selecting zones, 10 sensor failure, 22 Set Superv. Password parameter, 22 silencing alarms, 14 soft start, 2, 10, 13, 22, 27 Soft Start parameter, 13, 22 SP Change Enable parameter, 13, 22 SSS mode indicator, 10 Standby mode, 10 Standby Mode parameter, 12 Standby Percentage parameter, 12, 18 Standby Setpoint parameter, 12, 16, 18 Standby Type parameter, 18 Startup Mode parameter, 13, 19 Superv Config menu, 22, 27, 28 Supervisor parameters, 13, 22 Supervisor password, 3, 6, 13, 28

TCo alarm, 15 TCr alarm, 15 Tu0 error, 15, 25 Tu3 error, 15, 25 Tu5 error, 15, 25 Tu8 error, 15, 25 Tu9 error, 15, 25 tuning, 23 tuning errors, 15, 25 tuning parameters, 12, 18, 22, 24

unit of measure, 5, 8, 20 unused zone, 5, 10

wiring diagrams, where to find, 1

rate action, 12, 18, 24, 25 rate, resetting, 22 Reset PID Parameters parameter, 13, 22 resetting highest and lowest process value

reading, 22 reversed thermocouple, 15, 22, 25

RMB/6 and RMB/12 Hot Runner Controller Configuration and Operation Manual

Warranty

This equipment is warranted to be free from defects of material and workmanship. It is sold subject to our mutual agreement that the liability of the seller is to replace or repair this equipment at its factory, provided that the equipment is returned with transportation prepaid within the warranty period, which starts when the unit is purchased. The warranty period is two years.

The purchaser agrees that the seller assumes no liability under any circumstances for consequential damages resulting from use of this equipment or from improper handling or packaging of shipments returned to the factory.

Components which wear or which are damaged by misuse are not warranted. These include contact points, fuses, electromechanical relays, and triacs. Units which have been modified by a customer in any way are not warranted.

Other than those expressly stated herein, there are no other warranties of any kind, express or implied, and specifically excluded but not by way of limitation, are the implied warranties of fitness for a particular purpose and merchantability.

It is understood and agreed the seller’s liability whether in contract, in tort, under any warranty, in negligence or otherwise shall not exceed the return of the amount of the purchase price paid by the purchaser and under no circumstances shall seller be liable for special, indirect, incidental or consequential damages. The price stated for the equipment is a consideration in limiting seller’s liability. No action, regardless of form, arising out of the transactions of this agreement may be brought by purchaser more than two years after the cause of action has accrued.

Seller’s maximum liability shall not exceed and buyer’s remedy is limited to either (i) repair or replacement of the defective part or product, or at seller’s option (ii) return of the product and refund of the purchase price, and such remedy shall be buyer’s entire and exclusive remedy. The specifications put forth in this manual are subject to change without notice.

Athena Controls RMB/12, RMB/6 Configuration And Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual