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Dancer control detail
(4)
Dancer roll malposition detection (signal loss detection)
This function prevents motor speed to increase by the dancer control when dancer roll falls by signal loss.
Parameter
Number
131
PID upper limit
132
PID lower limit
Signal loss detection
711
stationary time
• If dancer roll stays at the upper limit or the lower limit for more than Pr. 711 Signal loss detection stationary time , it is
recognized as dancer roll malposition (signal loss), and compensation by PID control becomes 0.
When below two conditions are both met, dancer control (PID calculation) is resumed.
1. Motor is stopped or output is shutoff.
2. Start signal is OFF.
• Y50 signal can be output for dancer roll malposition detection (signal loss detection).
Set "50 (positive logic) or 150 (negative logic)" in any of Pr. 190 to Pr. 196 (Output terminal function selection) to assign Y50
signal to an output terminal.
Pr. 190 to Pr. 196
Setting
Positive
Negative
logic
logic
50
150
Normal operation
Main speed command
Start command
Y50
OFF
28
Name
Setting Range
400 to 600%, 9999
400 to 600%, 9999
0 to 100s, 9999
Signal
Function
Dancer roll
Y50
signal loss
detection
Dancer roll center position
Pr. 711
(Signal loss detection stationary time)
ON
Signal loss detection
Output speed at signal loss
Increments
0.1%
0.1%
0.01s
Output when dancer roll malposition is detected.
When below two conditions are met, Y50 signal is canceled.
1. Motor is stopped or output is shutoff.
2. Start signal is OFF.
Dancer roll falls
to the lower limit.
Lower limit of dancer roll (Pr. 132)
PID manipulated
amount = 0
ON
Turns OFF when motor
is stopped and start
signal is OFF.
Initial
Remarks
Value
400% -100%
9999
500%
9999
600% 100%
9999:No signal loss
9999
detection
Functions
OFF
OFF
0%
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