Mitsubishi Electric FR-E720-600 Instruction Manual page 245

(2) Dancer control overview
Performs dancer control by setting 40 to 43 in Pr. 128 PID operation selection.The main speed command is the speed command
of each operation mode (external, PU, communication). 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.
STF
(3) Connection diagram
Sink logic
Pr. 128 = 41
Pr. 183 = 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.
PID adding value
Main speed
ON
MCCB
Power supply
Forward rotation
Reverse rotation
PID control selection
Main speed commnad
setting potentiometer
*1
Feedback value of
dancer roll position
Special operation and frequency control
Output frequency
Inverter
R/L1 U
V
S/L2
T/L3 W
STF
STR
MRS(X14)
*3
SD
(FUP)RUN
*2
(FDN)FU
*2
10
2
5 Output signal common
SE
4
Time
Motor
IM
Upper limit
Lower limit
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