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Multiple range high/low limit alarm output
Note 1: Range changes to Small range when range select signal is H level, and to Large range in L
level.
Note 2: High-high/low-low limit alarm is activated when Small range is selected. High/low limit
alarm is not output to display.
High/low limit alarm is activated when Large range is selected. High-high/low-low
limit alarm is not output to display.
Note 3: Alarm output state is the same state to which digital output 1 or 2 is set. When converter
power is OFF, contact output is OPEN.
Note 4: Each alarm set value % is the percent set to the first range.
Note 5: Hysteresis of each alarm is 2.5 % for the first range.
Example
When Large range and Small range are set as below:
Large range (Range 1): 1000 m
3
/h
Small range (Range 2): 500 m
3
/h
And you want to set alarm values as below:
Large range alarm set values
High limit value: 800 m
3
/h
Low limit value: 600 m
3
/h
Small range alarm set values
High-high limit value: 400 m
3
/h
Low-low limit value: 300 m
3
/h
Set the alarm set values as below:
High limit value: 80 % (800 m
3
/h÷1000 m
3
/h=0.8)
Low limit value: 60 % (600 m
3
/h÷1000 m
3
/h=0.6)
High-high limit value: 40 % (400 m
3
/h÷1000 m
3
/h=0.4) See Note4.
Low-low limit value: 30 % (300 m
3
/h÷1000 m
3
/h=0.3) See Note4
Lo
w
-low limit
High-high limit
Low limit
Flow rate
High limit
Small range (Range 2)
Large range (Range 1)
Alarm output ON
Alarm output ON
Alarm output ON
Alarm output ON
Alarm output ON
DI range select signal
Multiple range
High limit alarm output
DO1
Multiple range
Low limit alarm output
DO2
Time