Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 515 / 727

(A) Application parameters
514
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.
(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 page 393 for the setting.)
• 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 page 515
Pr.59 Remote function selection page 279
Pr.73 Analog input selection page 393
Pr.79 Operation mode selection page 291
Pr.178 to Pr.189 (Input terminal function selection) page 415
Pr.190 to Pr.196 (Output terminal function selection) page 370
Pr.561 PTC thermistor protection level page 317
Pr.902 to Pr.905 Frequency setting voltage (current) bias/gain page 402
5V(10V)
0V
20mA
4mA
0%
Feedback value
Potentiometer, etc.
Lower limit
position
Upper limit
position
100%