6. FUNCTION AND DATA SETTINGS
IM 1E7B0-02E
6-16
(1) Shows 1% response cause of excessive signal beyond the rate limit. However, actual
output is under damping that described by a solid line.
(2) Shows the flow rate signal (1%) of just after damping calculation (1) and rate limit
value.
(3) This signal is recognized as a flow rate signal since it does not return to within the
rate limit value within the dead time.
(4) The output signal follows the damping curve and tracks the step signal.
Example 2: Slurry Noise
Slurry Noise
Flow rate value after rate limiting and damping.
Flow rate value after
rate limiting
Dead time: 1 sec.
+1%
–1%
Input: 0 to 10%
Damping time constant: 1 sec.
Dead time : 1 sec.
Rate limit value: 1%
The left figure shows that the slurry
noise is not a flow rate signal.
Time
Display
Description
Set a rate limit value in parameter number "n3".
Setting Range : 0 to 10%.
Set the dead time in parameter number "n4".
Setting Range : 0 to 15 seconds.
Default : 5%
Default : 0%
*Item "n" can be opened by entering "55" in parameter number "L2".
6.3.16 Pulsating Flow
• The pulsating flow produced by a plunger pump results in inaccurate average flow
rate values. This function makes it possible to accurately track flow rate changes and
control calculation.
Display
Description
Select "01" (pulsating flow counteraction) in parameter number "n6".
Code
Contents
00
01
Nomal
Counteracting pulsating flow
Default : 00
*Item "n" can be opened by entering "55" in parameter number "L2".
