Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual page 256

Special operation and frequency control
(2) 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 in Pr. 45 Second 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.
(3) Connection diagram
Sink logic
Pr. 128 = 41
Pr. 182 = 14
Pr. 190 = 15
Pr. 191 = 14
Pr. 192 = 16
∗1
The main speed command differs according to each operation mode (external, PU, communication)
∗2
The used output signal terminal changes depending on the Pr. 190 to Pr. 192 (output terminal selection) setting.
∗3
The used input signal terminal changes depending on the Pr. 178 to Pr. 184(input terminal selection) setting.
∗4
The AU signal need not be input.
256
PID adding value
Main speed
ON
STF
Power supply
Forward rotation
Reverse rotation
PID control selection
Main speed command
setting potentiometer
Feedback value of
dancer roll position
Output frequency
Inverter
MCCB
R/L1
S/L2
T/L3
STF
STR
RH(X14)
*3
SD
(FUP)RUN
*2
(FDN)FU
*2
10
2
*1
5
4
*4
Time
Motor
U
V IM
W
Upper limit
Lower limit
Output signal common
SE