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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. …
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
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
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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