Mitsubishi Electric FR-D720S SC EC Instruction Manual page 407

Parameter
Dancer control overview
Performs dancer control by setting "40" to "43" in Pr. 128 "PID action selection". The main speed
command is the speed command of each operation mode (external, PU, Network). Performs
PID control by the position detection signal of the dancer roller, then the result is added to the
main speed command. For acceleration/deceleration of the main speed, set the acceleration
time in Pr. 44 "Second acceleration/deceleration time" and the deceleration time in Pr. 45 "Sec-
ond deceleration time".
Set 0s normally to Pr. 7 "Acceleration time" and Pr. 8 "Deceleration time". When the Pr. 7 and
Pr. 8 setting is large, response of dancer control during acceleration/deceleration is slow.
Fig. 6-132: Signal overlay during dancer control
Connection diagram
The following figure shows a typical application example:
Pr. 128 = 41
Pr. 182 = 14
Pr. 190 = 15
Feedback value of
dancer roll position
Fig. 6-133: Example in source logic
The main speed command differs according to each operation mode (external, PU, network).
The used input signal terminal changes depending on the Pr. 178 to Pr. 182 setting.
The used output signal terminal changes depending on the Pr. 190, Pr. 192 or Pr. 197 setting.
The AU signal need not be input.
FR-D700 SC EC
PID adding value
Main
speed
Power
supply
Forward rotation
Reverse rotation
PID control selection
Potentiometer
1kΩ, 1–2W
(Main speed
command)
ON
U
L1
L2 V
L3
W
STF
STR
RH (X14)
Upper limit (FUP)
(FUP) RUN
PC
10
2
SE
5
Output signal common
4
Special operation
Output frequency
Tme
I001841E
M
I002004C
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