OCP-02502-G - 第22页

VITRONICS REFLOW SOLDERING SYSTEMS

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

20

SHUTDOWN PROCEDURE

When the Power Off ICON, or File, then Stop Running Process is

selected, the oven begins the shutdown procedure. The heaters are turned off, the

conveyor and cell fans continue to run.

The status bar will display:

SHUTDOWN

When the oven has entered shutdown, or when the oven is first powered up, a

procedure called SHUTDOWN is executed. (This procedure cannot be modified by

the user) During SHUTDOWN, the cell fans are enabled and the conveyor runs at

maximum speed. The red light on the light tower is on.

When the temperatures of all cells are below 100 degrees C, the oven enters the

OFF state. The status bar indicates:

OFF

The cell fans and the conveyor stop. The red light on the light tower, and the red

light on the operator panel are on.

While the oven is in an OFF state, if any cell temperature goes above 100 deg C,

the oven will re-enter the SHUTDOWN procedure , the Oven will go into “Alarm”

and the Cell fans will run.

WARNING

WHEN THE OVEN IS "OFF", THE ELECTRICAL POWER IS STILL PRESENT

IN THE OVEN AND REMAINS A PERSONAL INJURY HAZARD

WHICH CAN RESULT IN

RISK OF INJURY OR DEATH !!!!!

VITRONICS REFLOW SOLDERING SYSTEMS

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

21

Status messages, and Oven Control Actions are based on the following

definitions for the Status Terms used:

Status Terms

Status DESCRIPTION

OFF

The oven is not running

SHUTDOWN

The Operator shutdown the oven.

STABILIZING

The oven is trying to reach the set points of the present

recipe. See Oven Status Bar.

COUNTDOWN

The oven has stabilized and is in a "final countdown

delay" before going to "process ready".

READY

The oven is "process ready".

WARNING

A process variable is outside limits. See Alarm/Event Log

CRITICAL WARNING

A process variable is outside limits. See Alarm/Event Log

ALARM

A process variable is outside limits. See Alarm/Event Log

CRITICAL ALARM

A process variable is outside limits. See Alarm/Event Log

The alarm operations are defined:

Convection Low: A cell fan(s) has stopped or Inverter failure

Rail Width: Rail width position is outside the acceptable tolerance.

Board Jam: A space was NOT detected between boards where a

space was expected (or not transferred at Offload).

Hood Open: The hood is open. (The main Process Tunnel Hood)

IAS: A cell is above a preset temperature

measured by the Heater Cell thermocouple(s)

or: the IAS Unit detected a temperature alarm condition,

or: a High Temperature Switch has opened.

This is only a partial list of Alarms , See “Alarm / Event

Messages on next page for additional Alarms

VITRONICS REFLOW SOLDERING SYSTEMS

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

22

ALARM / EVENT MESSAGES

Information about changes in oven status, alarms, set points and filing

updates are recorded and displayed (in the order of occurrence) in the Event

& Alarm log displayed at the bottom of the screen. A message will start with

"Alarm:" (or “Warning”) if some value critical to the operation of the oven is

outside of “expected range”, or

"Event:" if some normal operator action has occurred.

Only the last Four system messages are displayed at the Oven Status Bar,

however, at the Pull-Down Menu, (or double-click on the messages)…

selecting Log, View, then Alarm Log will display an Alarm Log Dialogue

Box which has the option of displaying the Alarms and Events Log for the

Month.

The following alarm messages are in order of priority with the most serious listed first.

They are set by the Oven Operating Program & cannot be modified or disabled.

SOME “ALARM MESSAGES” MAY NOT EXIST DEPENDING ON OPTIONS

EMERGENCY STOP............................E-stop switch pushed (or electrical cabinet open)

CONVEYOR STOPPED.......................The conveyor is not moving.

COMMUNICATIONS ALARM..............Communication between the computer and the

controller has failed.

HOOD OPEN........................................The Hood (Main Tunnel) is open .

BOARD DROPPED..............................An expected board did not arrive at the

off load sensor.

OIL LEVEL LOW ..................................The oil level is low in the Lubrication Reservoir

COOLANT FLOW.................................The coolant flow low or stopped. (or tank level low)

COOLANT TEMP.................................The enhanced cool coolant temp is too high.

CONVECTION LOW.............................There is a problem with one or more

convection fans.

GAS PRESSURE LOW........................The gas pressure is below switch setpoint and too

low to maintain the gas atmosphere in the tunnel.

SOME “STATUS MESSAGES” MAY NOT EXIST DEPENDING ON OPTIONS

GAS ON/OFF........................................The gas main gas valve is open/closed.

COOLANT ON/OFF..............................The enhanced cool cell coolant is

allowed to circulate.

CONVECTION ON/OFF.......................The cell motors are ON (or OFF), or at the

speed shown.

EXHAUST ON/OFF ..............................The controlled exhaust valve is open/closed.

UPS BATTERY LOW...........................The UPS Battery is low, and requires

charging or replacement

N2 PURGE............................................The Nitrogen Purge is taking place.