<6. PARAMETER DESCRIPTION>
6-27
IM 01E30D01-01EN
NOTE
For more details regarding the setting of
hysteresis width, read the description of setting
parameter for
F30: Auto Range Hys
and
F31:
Bi Direction Hys
.
[F30: Auto Range Hys]
Setting of automatic range-
switching hysteresis width
Automatic switching takes place for multiple range
switching when 100% of the range is exceeded,
and this parameter allows a hysteresis width to be
set for this switching.
Read Figure 6.4.1.
[F31: Bi Direction Hys]
Setting of forward/reverse
flow measurement hysteresis width
This parameter sets the hysteresis for forward/
reverse flow rate measurement as a % value of the
minimum flow span.
Read Figure 6.4.1.
(6) Menu G: Alarm Setting items
Menu G principally contains setting items relevant
to alarms. (Read Section 6.5.)
[G10: Low Alarm]
Low alarm setting
This parameter sets the low limit (L) alarm value,
and this is done using a % value of the maximum
span.
●
A setting value of -105% indicates that the
alarm is disabled.
[G11: High Alarm]
High alarm setting
This parameter sets the high limit (H) alarm value,
and this is done using a % value of the maximum
span.
●
A setting value of 105% indicates that the alarm
is disabled.
Output Example 1
The high alarm (H) is set to 80% or more; the low
alarm (L) is set to 30% or less; and the H/L alarm
hysteresis width is set to 0%.
Settings are:
G10: Low Alarm
= 30%
G11: High Alarm
= 80%
G12: H/L Alarm Hys
= 0%
0
Time (t)
Select “H/L Alarm(O)” for
F10: DO Function
Select “Closed (On) Act” for
F11: DO Active Mode
Select “Yes” for
G28: Alm-H/L
DO
Open
Closed
Open
Open
Closed
High Alarm
Instantaneous flow rate
Low Alarm
30
50
80
100
[%]
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