Dancer Control (Pr. 44, Pr. 45, Pr. 128 To Pr. 134) - Mitsubishi Electric FR-E700 Instruction Manual

Parameter
6.20.2

Dancer control (Pr. 44, Pr. 45, Pr. 128 to Pr. 134)

Performs PID control by feedbacking the position detection of the dancer roller, controlling the danc-
er roller is in the specified position.
Pr. No. Name Initial Value
FR-E720S-110SC or
less
FR-E740-095SC
Second
or less
44
acceleration/
FR-E740-120SC
deceleration time
and 170SC
FR-E740-230SC
and 300SC
Second
45
9999
deceleration time
PID action
128
selection
PID proportional
129
100%
band
PID integral time
130
131
PID upper limit 9999
132
PID lower limit 9999
PID action set
133
9999
point
PID differential
134
9999
time
The above parameters can be set when Pr. 160 "User group read selection" = 0.
This parameter allows its setting to be changed during operation in any operation mode even if
"0" (initial value) is set in Pr. 77 "Parameter write selection".
FR-E700 SC EC/ENE
Setting
Description
Range
5 s
This parameter is the acceleration time of the main speed during
0–3600/
dancer control. It will not function as second acceleration/
360 s
10 s deceleration time.
15 s
0–3600/
This parameter is the deceleration time of the main speed during
360 s
dancer control. It will not function as second deceleration time.
9999
0 PID action is not performed
20 PID reverse action
21 PID forward action
40 PID reverse action
41 PID forward action
42 PID reverse action
0
43 PID forward action
50 PID reverse action
51 PID forward action
60 PID reverse action
61 PID forward action
If the proportional band is narrow (parameter setting is small), the
manipulated variable varies greatly with a slight change of the
0.1
measured value. Hence, as the proportional band narrows, the
–
response sensitivity (gain) improves but the stability deteriorates,
1000%
e.g. hunting occurs.
Gain Kp = 1/proportional band
9999 No proportional control
For deviation step input, time (Ti) required for only the integral (I)
0.1
action to provide the same manipulated variable as that for the
–
proportional (P) action. As the integral time decreases, the set
1 s
3600 s
point is reached earlier but hunting occurs more easily.
9999 No integral control.
Maximum value
If the feedback value exceeds the setting, the FUP signal is output.
0–100%
The maximum input (20 mA/5 V/10 V) of the measured value
(terminal 4) is equivalent to 100%.
9999 No function
Minimum value
If the process value falls below the setting range, the FDN signal is
0–100%
output. The maximum input (20 mA/5 V/10 V) of the measured
value (terminal 4) is equivalent to 100%.
9999 No function
0–100% Used to set the set point for PID control.
9999 Always 50%
For deviation ramp input, time (Td) required for providing only the
0.01
manipulated variable for the proportional (P) action. As the
–
differential time increases, greater response is made to a deviation
10.00 s
change.
9999 No differential control.
Measured value (terminal 4)
Set value (terminal 2 or Pr. 133)
Addition For dancer control set
method: point (Pr. 133),
fixed measured value
(terminal 4)
Addition
main speed (speed
method:
command of the operation
ratio
mode)
Deviation value signal input
(LONWORKS, CC-Link communication)
Set point and measured value input
(LONWORKS, CC-Link communication)
Special operation
Refer to
Parameters referred to
Section
59 Remote function 6.6.3
selection
73 Analog input 6.16.1
selection
79 Operation mode 6.18.1
selection
178–184 Input terminal 6.10.1
function selection
190–192 Output terminal 6.10.5
function selection)
C2 (Pr. 902) Frequency setting 6.16.3
– voltage (current)
C7 (Pr. 905) bias/gain
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