OCP-02502-G - 第19页

VITRONICS REFLOW SOLDERING SYSTEMS

EM 02502-G 15-Nov-00 (c) PAGE Operator’s Manual

17

OVEN STATUS - ALARMS, WARNINGS, AND SHUTDOWNS

ALARM LEVELS

There are five (5) alarm levels. Starting with the least serious, they are:

1) Notify - During this condition:

1) No change occurs in the Oven Operation

2) The Oven Status Bar will display the “Parameter Status”.

2) Warning - During this condition:

1) The Yellow light on the light tower will be on

2) The audible alarm will be off.

3) The conveyor will remain at setpoint

4) The heaters will remain at setpoint

5) Nitrogen or Air will remain at setpoint

6) Cell Fans will continue to run

7) The Oven Status Bar will display WARNING in Blue Letters.

No user input is required to clear this alarm state. The oven will go to the

process ready state when the alarm condition no longer exists.

3) Critical Warning - During this condition:

1) The Red light on the light tower will be on

2) The audible alarm will be on

3) The conveyor will continue to run at setpoint

4) The heaters will continue temperature at setpoint

5) Nitrogen or Air will remain at setpoint

6) Cell Fans will continue to run at setpoint

7) The Oven Status Bar will display CRITICAL WARNING in Blue Letters.

4) Alarm - During this condition:

1) The Red light on the light tower will be on

2) The audible alarm will be on

3) The conveyor will run if oven temp above 100 deg

4) The heaters will turn off

5) Nitrogen or Air will be turned off

6) Cell Fans will continue to run (Full speed with Nitrogen Option)

7) The Oven Status Bar will display ALARM in Blue letters.

5) Critical Alarm - During this condition:

1) The Red light on the light tower will be on

2) The audible alarm will be on

3) The conveyor will run

4) The heaters will turn off

5) Nitrogen or Air will be turned off

6) Cell Fans will stop

7) The Oven Status Bar will display CRITICAL ALARM in Red Letters.

SELECT “SETUP”, and “DISPLAY LAYOUT” TO SET “RED”

SCREEN BACKGROUND WHEN ALARMS OCCUR

VITRONICS REFLOW SOLDERING SYSTEMS

EM 02502-G 15-Nov-00 (c) PAGE Operator’s Manual

18

STABILIZING

Stabilization Time and Countdown Time are edited in the Process Recipe.

Stabilization Time is the maximum period necessary for the oven to normalize

and bring all conditions within operating tolerances.

(That is; "at setpoint".)

Countdown Time is a time period the "at setpoint" conditions must be maintained

after which, the oven will go to "Process Ready".

When a Product is started, Stabilizing starts and the “Status Bar” displays:

STABILIZING - #

(The (#) number indicates the remaining minutes of stabilization time

During Stabilizing, if the oven reaches "at setpoint", the Countdown Time starts.

After Countdown: 1) If "at setpoint", then the oven enters "Process Ready".

2) If "not at setpoint ", then the oven continues Stabilizing

(or Re-Stabilizing)

(Oven can re-enter Countdown again by reaching

"at setpoint " within the remaining Stabilizing Time)

If the Stabilizing Time has expired and the oven conditions are not within the:

1) process warning tolerances - the oven enters a Warning State.

2) process shutdown tolerances - the oven enters a Shutdown State.

SYSTEM SETUP

The oven enters the system setup state any time an action is performed which will

cause a process parameter to go beyond the tolerance; such as during calibrations,

during QUICK COOL, MANUAL RAIL WIDTH ADJUST, and other similar

functions. This occurs automatically to temporarily disable any non-critical alarms

which may be affected, and the Yellow light on the light tower will be on.

The Oven Status Bar will display:

SETUP

WARNING

The oven displays a warning when a cell's temperature, the conveyor speed, (or

other function set) goes beyond the values specified in the process recipe.

The Process Ready signal is turned off and the yellow light will light.

The Oven Status Bar will display:

WARNING

The Event & Alarm log will display the reason for the warning state.

A part of any cell with low temperature will be displayed in blue. (The more it goes

below temp, the more blue will be displayed)

VITRONICS REFLOW SOLDERING SYSTEMS

EM 02502-G 15-Nov-00 (c) PAGE Operator’s Manual

19

ALARM SHUTDOWN

When a Critical Alarm condition is detected in the oven, an alarm message will be

displayed and shutdown will occur.

An alarm shutdown can occur when any cell set for critical alarm goes over

(or under) acceptable temperature limits or if the actual conveyor speed is over

(or under) the setpoint.

A part of any cell with over temperature will be displayed in red.

(The more it goes above temp, the more red will be displayed)

A part of any cell with low temperature will be displayed in blue.

(The more it goes below temp, the more blue will be displayed)

The Oven Status Bar will display:

SHUTDOWN: ALARM

The Event & Alarm log will display the reason for the alarm shutdown.

PROCESS READY

The oven is in the process ready state when ALL of the following exist:

1) All the cell temperatures are within the Process Recipe tolerance.

2) The conveyor speed is within the Process Recipe tolerance

3) There are no alarm conditions or warnings

4) The countdown timer has expired.

When in the process ready state:

1) The Process Ready signal and the green light are turned on.

2) The Oven Status Bar will display:

READY