3 14 Reload Default Values3 14 Reload Default Values
The default values listed in Table 1.4 are stored in the memory as the product
leaves the factory. In certain occasions it is desirable to retain these values
after the parameter values have been changed. Here is a convenient tool to
reload the default values.
The default values listed in Table 1.4 are stored in the memory as the product
leaves the factory. In certain occasions it is desirable to retain these values
after the parameter values have been changed. Here is a convenient tool to
reload the default values.
Operation
Press several times until . Then press . The upper
display will show .Use up-down key to select 0 to 1. If C unit is
required, select 0 for FILE and if F unit is required, select 1 for FILE. Then
Press for at least 3 seconds. The display will flash a moment and the default
values are reloaded.
L
L
Press several times until . Then press . The upper
display will show .Use up-down key to select 0 to 1. If C unit is
required, select 0 for FILE and if F unit is required, select 1 for FILE. Then
Press for at least 3 seconds. The display will flash a moment and the default
values are reloaded.
L
L
CAUTION
The procedures mentioned above will change the previous setup data. Before
doing so, make sure that if it is really required.
The procedures mentioned above will change the previous setup data. Before
doing so, make sure that if it is really required.
FILE 0
C Default FileL
FILE 0
C Default FileL
FILE 1
F Default
FileL
FILE 1
F Default FileL
3 13 Heater Break Alarm3 13 Heater Break Alarm
A current transformer ( parts No. ) should be installed to detect the
heater current if a heater break alarm is required. The CT signal is sent to
input 2, and the PV2 will indicate the heater current in 0.1 Amp. resolution.
The range of current transformer is 0 to 50.0 Amp.
CT94-1A current transformer ( parts No. ) should be installed to detect the
heater current if a heater break alarm is required. The CT signal is sent to
input 2, and the PV2 will indicate the heater current in 0.1 Amp. resolution.
The range of current transformer is 0 to 50.0 Amp.
CT94-1
Example:
A
furnace
uses two 2KW heaters connected in parallel to warm up the process.
The line voltage is 220V and the rating current for each heater is 9.09A. If we
want to detect any one heater break, set A1SP=13.0A, A1HY=0.1
A1FN=PV2.L, A1MD=NORM, then
Example:
A furnace uses two 2KW heaters connected in parallel to warm up the process.
The line voltage is 220V and the rating current for each heater is 9.09A. If we
want to detect any one heater break, set A1SP=13.0A, A1HY=0.1
A1FN=PV2.L
,
A1MD=NORM, then
Heater Break Alarm 1
Setup :
IN2 = CT
A1FN = PV2.L
A1MD = NORM
A1HY = 0.1
Adjust : A1SP
Trigger levels : A1SP 1/2 A1HYA
Heater Break Alarm 1
Setup : IN2 = CT
A1FN = PV2.L
A1MD = NORM
A1HY = 0.1
Adjust : A1SP
T
rigger
levels : A1SP 1/2 A1HYA
Limitations :
1. Linear
output can't use heater break
alarm.
2. CYC1 should use 1 second or
longer to detect heater current reliably.
Limitations :
1. Linear output can't use heater break
alarm.
2. CYC1 should use 1 second or
longer to detect heater current reliably.
0
10
20 30
40
50
A
0
10
20 30
40
50
A
0
10
20 30
40
50
A
No heater breaksNo heater breaks 1 heater breaks1 heater breaks 2 heaters breaks2 heaters breaks
Alarm !Alarm !
Alarm !Alarm !
Figure 3.9
Heater Break Alarm
Figure 3.9
Heater Break Alarm
Heater Break Alarm 2
Setup : IN2 = CT
A2FN = PV2.L
A2MD = NORM
A2HY = 0.1
Adjust : A2SP
Trigger levels : A2SP 1/2 A2HYA
Heater Break Alarm 2
Setup : IN2 = CT
A2FN = PV2.L
A2MD = NORM
A2HY = 0.1
Adjust : A2SP
Trigger levels : A2SP 1/2 A2HYA
37
UM83001A-August-2024
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