Mitsubishi Electric 800 Series Instruction Manual page 515

(A) Application parameters
Adjustment procedure for dancer roll position detection signal
• When the input of terminal 4 is voltage input, 0 V and 5 V (10 V) are the lower limit position and upper limit position,
respectively. When it is current input, 4 mA and 20 mA are the lower limit position and upper limit position, respectively.
(initial value) When the potentiometer has an output of 0 to 7 V, Pr.905 must be calibrated at 7 V.
20mA
4mA
(Example) To execute control at the dancer center position using a 0 to 7 V potentiometer
1) Switch the current/voltage input selection switch to "OFF", set "2" to Pr.267 and set terminal 4 input to voltage input.
2) Input 0 V across terminals 4 and 5, and calibrate Pr.904. (The % display that is indicated at analog calibration is not
related to the % of the feedback value.)
3) Input 7 V across terminals 4 and 5, and calibrate Pr.905. (The % display that is indicated at analog calibration is not
related to the % of the feedback value.)
4) Set Pr.133 to "50%".
NOTE
• After changing the Pr.267 setting, check the voltage/current input selection switch. Incorrect setting may cause a fault, failure
or malfunction. (Refer to
• If the RH, RM, RL, or REX signal (multi-speed operation), or JOG signal is input in regular PID control, PID control is
interrupted. However, at dancer control, these signals are treated as main speed commands, so PID control is continued.
• During dancer control, Pr.44 and Pr.45 Second deceleration time is the parameter for setting the acceleration/deceleration
time for the main speed command. This function does not function as a second function.
• When the switchover mode is set by setting "6" to Pr.79, dancer control (PID control) is invalid.
• The acceleration/deceleration action of the main speed command is the same as that when the frequency is increased or
decrease by analog input. For this reason,
• With the main speed setting frequency setting, acceleration/deceleration is performed for the acceleration/deceleration time
set at Pr.44 and Pr.45, and with the output frequency setting, acceleration/deceleration is performed for the acceleration/
deceleration time set at Pr.7 and Pr.8. For this reason, with the output frequency, when the time set at Pr.7 and Pr.8 is longer
than the time set at Pr.44 and Pr.45, acceleration/deceleration is performed for the acceleration/deceleration time set at Pr.7
and Pr.8.
• The limit of the integral term is the smaller of 100% and the value after conversion of the straight line after interpolation of Pr.1
Maximum frequency by Pr.902 and Pr.903 to the PID manipulated amount. Note, however, that the lower limit frequency
limits the output frequency, but does not restrict the action of the integral item.
Parameters referred to
Pr.57 Restart coasting time
Pr.59 Remote function selection
Pr.73 Analog input selection
Pr.79 Operation mode selection
Pr.178 to Pr.189 (Input terminal function selection)
Pr.190 to Pr.196 (Output terminal function selection)
Pr.561 PTC thermistor protection level
Pr.902 to Pr.905 Frequency setting voltage (current) bias/gain
514
PARAMETERS
5V(10V)
0V
0%
Feedback value
page 393 for the setting.)
page 515
page 279
page 393
page 291
page 415
page 370
page 317
Upper limit
position
100%
Lower limit
position
page 402
Potentiometer, etc.