Mitsubishi Electric FR-A800 Series Instruction Manual page 520

• The following is the operation example during PID control (reverse action) operation.
Output frequency
20mA
4mA
STF
LF signal
PID signal
ALM signal
 Fault output after deceleration to stop (Pr.573 = "3, 13, or 23")
• When the analog current input becomes 2 mA or lower, the inverter output decelerates the motor to a stop, and then the
protective function E.LCI (4 mA input fault) is activated and the output is shut off.
• When the analog current input is restored during the deceleration, the motor is accelerated again and operates according
to the current input.
• The following is the operation example during PID control (reverse action) operation.
Output frequency
20mA
4mA
STF
LF signal
PID signal
ALM signal
• The following is the operation example when the analog input current is restored during deceleration under PID control
(reverse action).
Output frequency
20mA
Set point (fixed)
Measured value
4mA
STF
LF signal
PID signal
Downloaded from ManualsNet.com
Set point (fixed)
Measured value
Set point (fixed)
Measured value
Input current
decrease
2mA
OFF during
deceleration
search engine
E.LCI occurs
Input current
decrease
Return
3mA
2mA
Decelerates as the input current is lost
After deceleration stop, E.LCI occurs
Input current
decrease
Return
3mA
2mA
Decelerates as the input current is lost
Normal operation after the current is restored
Return
3mA
Time
Time
Time
5.12 (T) Multi-function input terminal parameters
1
2
3
4
5
6
7
8
9
10
519
5. PARAMETERS