102
4. Parameter description
Parameter
●
PID proportion Gain:
Let the output of inverter and error signal proportional relations, only
the system output have steady state error coefficient when proportional control. The larger the
proportion when movement,the faster of speed and the sensitiver of action with system.When the
proportion is too larger, number of shocks increased,adjust time will long,and the system became
instability.
●
PID integration Gain:
Let the output of inverter and integration of error signal proportional
relations.In order to eliminate steady state error coefficient, need integrational control.The larger
the integration, the integral action will too less to eliminate the steady state error coefficient, The
smaller it will hard to eliminate the steady state error coefficient, when the integration is too less,
the system became instability.
●
PID differential Gain:
Let the output of inverter and differential of error signal proportional
relations. The differential control can not used solely, it userd with proportion gain and integration
gain to constitute PID control. The differential control can improve the movement performance for
the controlled plant witch has larger inertia or delaide.
●
Upper integral:
Limit error upper accumulation, when the reeor value along with integral time
accumulation.
●
When the pressure feedback meet skew detection value of reach down and reach down time which
the stop detection of time set.
●
When the feel-back value is lower than Abnormal deviation level and continue exception duration
time P.176, the PID is exceptional. This time the screen will display
,
it will select freedom or
brakes according to P.177.
For example: when P.175=60%
，
P.176=30s
，
P.177=0, when the feel-back value is lower than 60%
of the target feel-back value and continue 30s, the screen will display
,
and
freedom stop.
PDF created with pdfFactory trial version