Yokogawa AXFA14G/C User Manual
Page 57
IM 01E20C02-01E
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6. PARAMETER DESCRIPTION
[G14: H/L Alarm Hys] Setting of upper/lower alarm
value hysteresis width
This parameter sets the hysteresis width for upper and
lower alarm value, using a % value of the maximum
span.
Output Example
The hysteresis width is set to 5%.
Settings are:
G10: Low Alarm = 30%
G11: High Alarm = 80%
G12: Low Low Alarm = 20%
G13: High High Alarm = 90%
G14: H/L Alarm Hys = 5%
F0611.EPS
0
Time (t)
H
L
HH
DO
DIO
LL
75%
75%
35%
35%
85%
85%
25%
Instantaneous flow rate
20
30
50
80
90
100
[%]
Select “H/L Alarm(O)” for F20: DO Function
Select “HH/LL Alarm(O)” for F21: DIO Function
Select “Closed (On) Act” for F22: DO Active Mode
Select “Closed/Short Act” for F23: DIO Active Mode
High High Alarm
High Alarm
Low Alarm
Low Low Alarm
25%
[G21: 4-20mA Alarm Out] Setting of the current
output during an alarm occurrence
This parameter can be used to set up the current output
during alarm occurrence in advance.
Fixed at 2.4 mA or less
Fixed at 4 mA
Fixed current value when an alarm occured.
Fixed at 21.6 mA or more
2.4mA or Less
4.0mA
Hold
21.6mA or More
T0629.EPS
Setting
Function
[G22: 4-20mA Burn Out] Display of the current
output during a CPU failure
This parameter displays the current output direction for
a CPU failure (i.e., burnout). Note that communication
will not be possible if such a failure occurs.
With the standard specification, this is set to High and
25mA is output when a failure occurs. Low is setup for
optional code C1, and in such a case, 0mA is output
when a failure occurs.
NOTE
The current output direction for a CPU failure
(i.e., burnout) can be changed. Refer to selection
10.2.1: Setting of Burnout Switch.
[G30: Alm-Setting] Alarm recognition of “Setting
Alarm”
This parameter specifies whether the setting alarm will
be recognized as an alarm.
T0630.EPS
Setting
Function
Not recognized as an alarm
Recognized as an alarm
No
Yes
[G31: Alm-Sig Over] Alarm recognition of “Signal
Overflow Alarm”
This parameter specifies whether the signal overflow in
process alarms will be recognized as an alarm. A signal
overflow occurs when there is an error in the input
signal.
T0631.EPS
Setting
Function
No
Yes
Not recognized as an alarm
Recognized as an alarm
[G32: Alm-Emp Pipe] Alarm recognition of “Empty
Pipe Alarm”
This parameter specifies whether the empty pipe
(flowtube is not filled with fluid) in process alarms will
be recognized as an alarm.
Setting
Function
No
Yes
T0632.EPS
Not recognized as an alarm
Recognized as an alarm