Yokogawa ADMAG AXF - Manual (Page 38)

IM 1E10C1-E 5-19
5. FUNCTION AND DATA SETTINGS
Example 1: Step Input
1%
10%
Step Signal
Flow rate value
after rate limiting
Flow rate value after
damping
➂
➀
➁
9 18
➃
63.2%
Input: 0 to 10%
Damping time constant: 3 sec.
Dead time: 3 sec.
Rate limit value: 1%
Dead time: 3 sec. (Sampling 80 ms × 18 times)
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.
The rate limit value can be set in parameter No. “n03”.
Setting Range: 0 to 10%
The dead time can be set in parameter No. “n04”.
Setting Range: 0 to 15 sec.
Displayed Description
Default: 5(%)
Default: 0(%)
(Rate limit function halt at 0)