Mitsubishi Electric FR-E800, Инструкция по эксплуатации

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15. (A) Application Parameters
15.6 Dancer control
 Block diagram of dancer control
*1 The main speed can be selected in all operation modes, External (analog voltage input, multi-speed), PU (digital frequency setting) and
Communication.
 Outline of dancer control
• Dancer control is performed by setting "40 to 43" in Pr.128 PID action selection . The main speed command is the speed
command for each operation mode (External, PU, and communication). PID control is performed by the dancer roll position
detection signal, and the control result is added to the main speed command. For the main speed acceleration/deceleration
time, set the acceleration time to
Pr.44 Second acceleration/deceleration time and the deceleration time to Pr.45
Second deceleration time .
NOTE
• Normally, set Pr.7 Acceleration time and Pr.8 Deceleration time to 0 s. When the Pr.7 and Pr.8 settings are large, dancer
control response becomes slow during acceleration/deceleration.
• If an automatic restart after instantaneous power failure is activated during dancer control, E.OC[] or E.OV[] is likely to occur.
In such case, disable the automatic restart after instantaneous power failure function ( Pr.57 = "9999").
Limit
Ratio
Acceleration/deceleration
of main speed
Main speed command
*1
Dancer roll
setting point
Pr.133
Terminal 4
Potentiometer
Dancer roll position detection
PID control
PID deviation
PID feedback
PID set point
Target frequency
X14
Pr.128 = 40, 41
Pr.128 = 42, 43
Acceleration/
deceleration
+
-
Kp(1+ +Td S)
Ti S
1
Convert to 0 to 100%
M
+
+
STF
PID adding value
Main speed
ON
Output frequency
Time
Output frequency