Introduction; Fr-A800-R2R Overview - Mitsubishi Electric A800 Plus Series Function Manual

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INTRODUCTION

1.1

FR-A800-R2R overview

• The FR-A800-R2R inverter with dedicated functions is useful for winding machines with dancer rolls when a difference
between the minimum diameter and the maximum diameter is large, a fast feeding speed is required, etc.
• This product is also useful for roll to roll winding applications such as for wire drawing machines and paper rolling machines
for printers.
• The following four control functions are available for keeping a constant tension on the workpiece.
Control function
Dancer feedback speed control
Tension sensor feedback speed control
Tension sensorless torque control
Tension sensor feedback torque control
• The following table shows parameter settings required to enable the four control functions.
Control function
Dancer feedback speed control
Tension sensor feedback speed control
Tension sensorless torque control
Tension sensor feedback torque control
∗1 To use the winding diameter calculation function during speed control without feedback, set Pr.128 = "40 or 41" and turn ON the X114 signal.
• The following table shows the combinations of control method/mode of the inverter and the validity of the four control
functions.
Pr.80
Pr.800 Pr.451
(Pr.453),
setting setting
Pr.81
∗2 ∗2
(Pr.454)
0, 100 —
1, 101 —
2, 102 —
9, 109 —
10, 110
Motor
11, 111
capacity,
number of
12, 112
motor poles
20
(initial 20
value)
9999
— (initial
value)
9999 —
∗4
∗2
The setting values of 100 and above are used when the fast-response operation is selected. (For the SND rating, the fast-response operation is
not available.)
∗3 Advanced magnetic flux vector control is applied if a vector control compatible option is not installed.
∗4 V/F control is applied when Pr.80 or Pr.81 is "9999", regardless of the Pr.800 setting.
∗5 The control method can be changed using the MC signal while the inverter is stopped.
Speed control to keep the line speed and the dancer roll position constant.
Speed control to keep the line speed and the tension sensor feedback constant.
Torque control to keep a constant tension on the workpiece without using a dancer roll
and a tension controller.
Torque control to more accurately keep a constant tension on the workpiece using
feedback from the tension sensor.
Pr.178 to Pr.186 (Input
terminal function selection)
∗1
∗1 114 (Assign the X114 signal to an
input terminal.)
Control
Control mode
method
Speed control
Torque control
Vector control
∗3
Speed control/torque
control switchover
Vector control test operation
Speed control
Real sensorless Torque control
vector control
Speed control/torque
control switchover
Advanced
magnetic flux Speed control
vector control
Advanced magnetic flux vector control for
the second motor
V/F control
FR-A800-R2R overview
Description
Pr.128 PID action
selection
40 or 41
Vector control or Real
sensorless vector control
Setting not required
is recommended.
40 or 41
Validity of control function
Dancer feedback
Tension sensorless
speed control /
torque control / tension
tension sensor
feedback speed
control
MC-ON MC-OFF MC-ON
×

× 
×
 
∗5 ∗5 ∗5
× × ×
 ×
×

×
 
∗5 ∗5 ∗5
 ×
×

×

INTRODUCTION
Control method
1
sensor feedback
torque control
MC-OFF
×
∗5
×
×
∗5
: Valid, ×: Invalid
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