Mitsubishi Electric FR-A820-00046 Instruction Manual page 781

Parameters
Priority of main speed commands
● The priority of main speed command sources when the speed command source is External is as
follows:
JOG signal > multi-speed setting signal (RL/RM/RH/REX) > pulse train input > 16bit digital input
(option FR-A8AX) > analog input (terminals 2, 4, 1)
● 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 terminal 1 is selected for the first and second PID, terminal 1 added compensation of the main
speed is invalid.
● If terminal 2 is selected for the first and second PID, the terminal 2 override function of the main
speed is invalid.
● 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".
● Polarity reversible operation of the main speed is not possible.
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, C7 (Pr. 905) must be calibrated at 7 V.
20 mA 5 V (10 V)
Fig. 5-284:
Example To execute control at the dancer center position using a 0 to 7 V potentiometer
Switch the current/voltage input selection switch to "OFF", set "2" to Pr. 267 and set terminal 4
input to voltage input.
Input 0 V across terminals 4 and 5, and calibrate C6 (Pr. 904). (The % display that is indicated at
analog calibration is not related to the % of the feedback value.)
Input 7 V across terminals 4 and 5, and calibrate C6 (Pr. 905). (The % display that is indicated at
analog calibration is not related to the % of the feedback value.)
Set Pr. 133 to "50%".
FR-A800
4 mA
0 V
Feedback value
0%
Dancer roller position detection signal adjustment
Upper limit
position
100% Lower limit
position
(A) Application parameters
Potentiometer, etc.
I002711E
5 - 579