Tacmina PW Series, Руководство по эксплуатации

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Description of functions
Pump control functions
Analog input-based proportional control
●
Basic operation
When the proportional band (straight line gradient) and
set points are set for the analog signals (4 to 20 mA)
from an external source, the number of strokes is auto-
matically controlled in accordance with the input sig-
nals.
●
Purposes of operation
Analog proportional control is used for proportional
injection and other uses.
●
Operation control signals
DC 4 to 20 mA
For the set point (SP),
the target values are
set on the X (horizontal)
axis.
(300strokes/min)
100%
(150strokes/min)
50%
0%
(0strokes/min)
0 SP 50% 100%
100%
PB:-50%
PB:-100%
PB:50%
PB:100%
50%
(300strokes/min)
100%
0%
(0strokes/min)
0 50 100%
PB:-75%
75
PB:-150%
PB:25%
PB:50%
Δ
Y
Δ
X
When the propor-
tional band (straight
line gradient) and
set
●
Set point (SP)
300strokes/min
0strokes/min
PB:-50%
PB:-100%
PB:50%
PB:100%
1.0 (
Δ
Y)
1.0 (
Δ
X)
For the proportional band
(PB), the reciprocal of the
straight line gradient is
set.
ex.
When the propor tional
band (PB) is 100%
proportional band (PB) = (
Δ
X /
Δ
Y) × 100
= (25 / 50) × 100 = 50%
●
Proportional band (PB)
When the set point is set When the proportional band is set When the pump has stopped
When the pump is operating
(20mA input)
●
Display
Keylock
The key can be locked to prevent operations from being performed by mistake.
Press the MODE key and SET key simultaneously for 2 or more seconds while the pump is stopped.
These are used to lock the keys or release the locked keys.
NOTE
While the keys are locked, the only operations that can be performed are STOP/START, key lock release
and MAX operation.
08-32̲EM-127̲PW(E).indd 31 2014/11/17 11:43:59