Chapter 4 Parameters|
||
|
4-88 Revision 2016/03, 6ELE, V1.14
10.20
Treatment of the Erroneous PID Feedback Level
Factory Setting: 0
Settings 0 Warning but continue to operate
1 Error and coast to stop
2 Error and ramp to stop
3
4
Ramp to stop and restart after time set at Pr10.21 (No display of error and
warning)
Ramp to stop, delay the setting time at Pr10.21. The number of time to restart
will be limited by the setting of Pr10.50.
In PID control mode, it will act according to Pr.10.20 when erroneous PID feedback level occurs.
10.21
Restart Delay Time after Erroneous PID Deviation Level Unit: 1
Settings 1 to 9999 sec Factory Setting: 60
10.22
Set Point Deviation Level Unit: 1
Settings 0 to 100% Factory Setting: 0
10.23
Detection Time of Set Point Deviation Level Unit: 1
Settings 1 to 9999 sec Factory Setting: 10
When the deviation is less than Pr.10.22 (in the range of PID set point to Pr.10.22 X PID set point) for a time
exceeding the setting of Pr.10.23, the AC motor drive will decelerate to stop to be constant pressure status
(This deceleration time is the setting of Pr.01.12). The system will be ready when the deviation is within the
range of PID set point to Pr.10.22 X PID set point during deceleration.
Example: suppose that the set point of constant pressure control of a pump is 4kg, Pr.10.22 is set to 5%,
Pr.10.23 is set to 15 seconds. It means that deviation is 0.2kg (4kgX5%=0.2kg), i.e. when feedback value is
higher than 3.8kg for a time exceeding 15 seconds, the AC motor drive will decelerate to stop (this
deceleration time will act according to Pr.01.12). When the feedback value is less than 3.8kg, the AC motor
drive will start to run.
10.24
Offset Level of Liquid Leakage Unit: 1
Settings 0 to 50% Factory Setting: 0
In the constant pressure status, when the liquid leakage is higher than Pr.10.24 X PID set point, the AC
motor drive will start to run.
It is used to prevent frequent run/stop operation due to liquid leakage.
10.24
feedbac k v al ue
Offset level of liquid leakage
10.25
Liquid Leakage Change Detection Unit: 1
Settings 0 to 100% (0:disable) Factory Setting: 0
10.26
Time Setting for Liquid Leakage Change Unit: 0.1
Settings 0.1 to 10.0 sec (0:disable) Factory Setting: 0.5
When the change of feedback value is less than the settings of Pr.10.25 and Pr.10.26, it means that the
liquid is leaking. When the system is in constant pressure status, the AC motor drive will start to run if the
feedback value is higher than these two settings.
To Next Page
Loading...
Need help?
General
