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Conveyor Oven Time Monitor with Over-Heating Alarm
Description:
An oven monitor displaying the tunnel time in minutes and seconds. The tunnel time is defined
as the time it takes for the heated object on the conveyor to travel from point A to point B in the
application diagram below. A visual indicator should activate if the tunnel time rises above a
preset limit of 22 minutes and 30 seconds which could cause overheating of the processed
material. The indicator should automatically reset when the tunnel time returns to the normal
operating range. For ease of use, the display should be averaged over a period of 1 second.
Application Diagram:
Wiring Diagram:
Parameter Configuration:
Heat Source
Tach
Ite
m
ValuPage
TACHOMETER
ENTER
18:40
Motor Control
Drive Train Specs:
1250 RPM at non-reduced
motor shaft equates to
9 minutes and 15 seconds
of tunnel time
Tunnel Oven
Encoder
Gear Motor
Coupling to
Chain Drive
Connect to
Coupling
DTM8000 Meter
AB
P1-1
P1-2
P1-3
P1-4
P1-5
P1-6
P1-7
P1-8
DTM8000-6
P1-9
P1-10
P1-11
P1-12
Not Used
Not Used
Not Used
}
AC Line Input 85-265VAC, 50-60 Hz
2 Amp
Encoder
black
white
red
NC1
C1
NO1
N
L
COM
+5V
S1
S2
NC2
C2
NO2
Not Used
Not Used
Not Used
Parameter Value Notes
10 2 Time Mode Setting
20 555 Display should indicate 9:15 (555) when motor at Reference RPM, parameter 21. In
time mode, all display values are entered in total number of seconds.
For example, 555 = (9 minutes * 60 seconds-per-minute) + 15 seconds.
21 1250 This is the RPM at which the Display Reference, parameter 20, should be displayed.
22 10 Pulses per revolution of shaft encoder or pickup is 10 PPM
24 1 Display filtering / averaging set to 1 seconds
40 4 Alarm active when display value is above upper limit
41 1 Constant alarm output with automatic reset
43 1 Flash display when alarm output is active
48 1350 Upper limit setting for 22 minutes and 30 seconds. In time mode, all limits are entered in
total number of seconds.
For example, 1350 = (22 minutes * 60 seconds-per-minute) + 30 seconds.