26
Dancer control detail
(4) Integral clamp at positive polarity
(Pr. 709)/
integral clamp at negative polarity
(Pr. 710)
Limit level of PID integral control action can be set from 0 to 100% with parameters.
If
Pr. 709
Integral clamp (positive polarity)
is set while
Pr. 710 Integral clamp (negative polarity)
is not set, the setting in
Pr. 709
becomes the clamp value in positive and negative polarity.
(5) PID differential time
(Pr. 134)
Set the differential time of differential (D) action. Td is the time required for (D) to provide the same manipulated variable as
that for the proportional (P) action. As the differential time increases, greater response is made to a deviation change.
(6) PID gain setting for under-set point value
(Pr. 135 to Pr. 137)
PID gain can be set individually with
Pr. 135 to Pr. 137
when deviation of dancer roll position signal (terminal 1) is negative
against the desired set point. When the setting is 9999, settings in
Pr. 129, Pr. 130, Pr. 134
are active independently of
negative or positive deviation.
Pr. 709
Pr. 710
Integral clamp
(positive polarity)
Integral clamp
(negative polarity)
9999
9999
100%
100%
9999
0 to 100%
100%
Setting in
Pr. 710
0 to 100%
9999
Setting in
Pr. 709
Setting
in
Pr. 709
0 to 100%
0 to 100%
Setting in
Pr. 709
Setting
in
Pr. 710
Parameter
Number
Name
Setting Range
Increments
Initial
Value
Remarks
135
PID proportional band for
under-set point value
0.1 to 1000%, 9999
0.1%
9999
Pr. 129
when 9999 is set.
136
PID integral time for
under-set point value
0.1 to 3600s, 9999
0.1s
9999
Pr. 130
when 9999 is set.
137
PID differential time for
under-set point value
0.01 to 10s, 9999
0.01s
9999
Pr. 134
when 9999 is set.
