Special Operation And Frequency Control - Mitsubishi Electric FR-A700 Instruction Manual

Special operation and frequency control

Parameter
Name
Number
132 PID lower limit
133 PID action set point
*1
134 PID differential time
*1
Output interruption
575
detection time
Output interruption
576
detection level
Output interruption
577
cancel level
*1 Pr. 129, Pr. 130, Pr. 133 and Pr. 134 can be set during operation. They can also be set independently of the operation mode.
*2 For details, refer to the FR-A700 PLC FUNCTION PROGRAM MANUAL.
(1) PID control basic configuration
⋅Pr. 128 = "10, 11" (Deviation value signal input)
Set point
⋅Pr. 128 = "20, 21" (Measured value input)
Pr. 133 or
terminal 2
0 to 5VDC
(0 to 10V, 4 to 20mA)
356
Initial Setting
Value
0 to 100%
9999
0 to 100%
9999
9999
0 to 3600s
1s
0Hz 0 to 400Hz
1000% 900 to 1100%
Deviation signal
+ -
Terminal 1
0 to 10VDC
(0 to 5V)
To outside
Feedback signal (measured value)
Kp: Proportionality constant Ti: Integral time S: Operator Td: Differential time
Inverter circuit
+ -
Set point
Terminal 4
Feedback signal (measured value)
Kp: Proportionality constant Ti: Integral time S: Operator Td: Differential time
Range
Set the minimum value. If the measured value falls below the
setting range, the FDN signal is output. The maximum input
(20mA/5V/10V) of the measured value (terminal 4) is
equivalent to 100%.
9999 No function
Used to set the set point for PID control.
9999 Terminal 2 input is the set point.
For deviation lamp input, time (Td) required for providing only
0.01 to the manipulated variable for the proportional (P) action. As the
10.00s differential time increases, greater response is made to a
deviation change.
9999 No differential control
The inverter stops operation if the output frequency after PID
operation remains at less than the Pr. 576 setting for longer
than the time set in Pr. 575.
9999 Without output interruption function
Set the frequency at which the output interruption processing
is performed.
Set the level (Pr. 577 minus 1000%) at which the PID output
interruption function is canceled.
Inverter circuit
PID operation
1
1+ +Td S
Kp
Ti S
PID operation
1
Kp 1+ +Td S
Ti S
4 to 20mADC (0 to 5V, 0 to 10V)
Description
Motor
Manipulated
variable
IM
Motor
Manipulated
variable
IM