Mitsubishi Electric 800 Series Instruction Manual page 350

• The priority of main speed command sources when "3" is set to Pr.79 Operation mode selection is as follows:
Multi-speed setting signal (RL/RM/RH/REX) > frequency setting (digital setting by PU or operation panel)
• Even if the remote operation function is selected by Pr.59 Remote function selection ≠ "0", compensation of the remote
setting frequency against the main speed is ignored. (The value is "0".)
• If the same terminal as an external input terminal having a speed command source (external terminal where a main speed
is input) is specified as the measured value input or set point input, the main speed is treated as "0".
• Setting Pr.73 ≥ 10 enables the polarity reversible operation when the PID manipulated amount is added to the main speed
command. (Polarity reversible operation of the main speed command without addition is not possible.)
 Adjustment procedure for dancer roll position detection signal
• When the input of terminal 4 is voltage input, 0 V is the lower limit position and 5 V (10 V) is the upper limit position (initial
values). When it is current input, 4 mA is the lower limit position and 20 mA is the upper limit position (initial values). When
the potentiometer has an output of 0 to 7 V, C7 must be calibrated at 7 V.
20mA 5V(10V)
4mA
(Example) To execute control at the dancer center position using a 0 to 7 V potentiometer
1.
Switch the voltage/current input selection switch (switch 4) to "V", set "2" in Pr.267, and set terminal 4 input to
voltage input.
2.
Input 0 V across terminals 4 and 5, and calibrate C6. (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 C7. (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 selection switch. Incorrect setting may cause a fault, failure or
malfunction. (Refer to
• If the Multi-speed operation (RH, RM, RL, or REX) signal, or JOG signal is input during 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 acceleration/deceleration time) is the parameter for setting the acceleration/
deceleration time for the main speed command. This function does not work 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. The SU signal sometimes stays ON even if operation is turned ON/OFF by the start signal. The set
frequency monitor is the value "main speed command + PID control" which is constantly changing.
• With the main speed setting frequency setting, acceleration/deceleration is performed for the acceleration/deceleration time
set in Pr.44 and Pr.45, and with the output frequency setting, acceleration/deceleration is performed for the acceleration/
deceleration time set in Pr.7 and Pr.8. For this reason, with the output frequency, when the time set in Pr.7 and Pr.8 is longer
than the time set in Pr.44 and Pr.45, acceleration/deceleration is performed for the acceleration/deceleration time set in 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 C2 and Pr.125 to the PID manipulated amount.
However, note 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 351
Pr.59 Remote function selectionpage 165
0V
0% 100%
Feedback value
page 266 for the setting.)
Upper limit
position
Lower limit
Potentiometer, etc.
position
14. (A) Application Parameters
14.6 Dancer control
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13
14
15
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18
19
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