Technical Reference
Manual-XPM3m Revision Date: August 2014
INDIVIDUAL CELL SENSING
Individual Cell Sensing and Alarm is
:
Standard, (installed on all ovens)
An option, (NOT installed on all ovens)
DESCRIPTION:
The Individual Cell Sensing Option
monitors for a cell fan motor failure or a heating cell over-temperature switch
failure.
Each Cell Fan Motor has a speed sensor mounted on the end of the motor shaft. When a motor slows to less than
500 RPM, the sensor sends a signal to produce the Fan Low Alarm. . When a low fan speed warning exists, an
alarm message indicating the specific failed fan motor is displayed in the oven software. (Check the heat slinger on
the suspect motor to determine actual fan operation.)
Each heating cell is equipped with a bimetallic over-temperature switch mounted on the backside of the heater
panel. When the cell temperature exceeds the switch temperature, the internal contacts open. This will interrupt
the 3- phase power to the heaters, and a signal is sent to the Oven Controller to indicate an "over-temperature"
condition. This will generate an IAS alert alarm message along with an alarm message that corresponds to the cell
location that generated the alarm.
General
Cell sensor monitoring only takes place when the cell fans are running to avoid nuisance alarms due to the
limitations of the existing controller. The IAS alarm level setting must be set for an alarm level other then critical in
order to sense and report individual temperature switch alarms. This is because a critical alarm level setting will
cause the cell fans to shut off immediately when an alarm occurs with a critical alarm level setting.
INDIVIDUAL CELL SENSING - C
ELL
M
OTOR SENSORS
Disconnect the following cell motor sensors one at time by unplugging connector P2 (E1479503 3 position
connector) on the corresponding E3152701 cell interface board with the cell fans running above 100 rpm.
Install a 3-pin connector (E1479503) with a jumper installed between pin 2 and pin 3 of the connector in place of the
cell motor sensor to force a cell fan alarm.
Verify that each alarm message is displayed on the PC and that the alarm message text corresponds to the cell
location with the alarm. It takes up to 68 seconds for an alarm condition to be detected and reported on the PC.
Inversely, removing the wire from P2-2 will remove a sensor failure indication.
This test verifies that each E3152202 board is configured correctly and is communicating correctly with the DI board.
E3152202
Board#
Model 520
Model 730/820 Model
940/1030
Model 1240
Master
Zone 1 Top
Zone 1 Top
Zone 1 Top
Zone 1 Top
Board 2
Zone 1 Bottom Zone 1 Bottom Zone 1 Bottom Zone 1 Bottom
Board 3
Zone 10 Top
Zone 13 Top
Zone 16 Top
Board 4
Zone 10
Bottom
Zone 13
Bottom
Zone 16
Bottom
Содержание XPM3m
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Страница 90: ...Technical Reference Manual XPM3m Revision Date August 2014 ENHANCED COOLING PACKAGE EC 1 FLOW DIAGRAM ...
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Страница 94: ...Technical Reference Manual XPM3m Revision Date August 2014 ENHANCED COOLING PACKAGE EC 3 FLOW DIAGRAM ...