Fuji Electric FRENIC-AQUA series, User Manual

Page: 478 / 751

6.3 Details of Function Codes
6-197
Chap. 6
FUNCTION C
ODES
6.3.8 J1 codes (PID control 1)
J101 PID Control 1 (Mode selection)
J202 (PID Control 2 (Mode selection))
Under PID control, the inverter detects the state of a control target object with a sensor or the
similar device and compares it with the commanded value (e.g., temperature control
command). If there is any deviation between them, PID control operates to minimize it. That
is, it is a closed loop feedback system that matches controlled variable (feedback amount).
PID control expands the application area of the inverter to process control (e.g., flow control,
pressure control, and temperature control).
If PID control is enabled (J101, J201 = 1, 2), the frequency control of the inverter is switched
from the drive frequency command generator block to the PID command generator block.
„
Mode Selection (J101, J201)
Data for
J101, J201
Function
0 Disable
1
Enable (Process control, normal
operation)
- Data setting range: 0 to 2
2
Enable (Process control, inverse
operation)
PID process control block diagram
- Using J01 enables switching between normal and inverse operations against the PID
process control output, so you can specify an increase/decrease of the motor rotating speed
to the difference (error component) between the commanded (input) and feedback amounts,
making it possible to apply the inverter to air conditioners. The terminal command
IVS can
also switch operation between normal and inverse.
For details about the switching of normal/inverse operation, refer to the description of
Switch normal/inverse operation IVS (E01 to E07, data = 21).
Speed command
selection
PID control 1
Filter
PID control 2
Filter
SV: command value FB: feedback value
PID1 Warning
judgment
PID1 PV failure
judgment
PID1 Warning
output
PID1 Failure
output
PID1 Unit/scale
Mu
lti
ste
p P
ID
in
str
ucti
on
PID control 2/1
switchover
"PID 2/1"
Integration/derivati
on reset
Integration hold
Anti-reset wind-up
Limiter
Upper limit
Mu
lti-
st
ag
e
PID
in
str
ucti
on
Limiter
Lower limit
PID
adjuster
Normal-operation/reverse-operation
selection IVS
P gain
Integration
time
Derivation
time
PID2 Unit/scale
PID 2 Warning
judgment
PID2 PV failure
judgment
PID2 Warning
output
PID2 Failure
output
Rev
ers
e
oper
at
ion
Deviation
Selection of
maximum
Selection of
minimum
Feedback value
Arithmetic unit
Addition,
difference
Average
Selection of
maximum
Selection of
minimum
PID1-FB
Selection of
maximum
Maximum hysteresis width, minimum
hysteresis width
Frequency
command
Cancel PID control
”Hz/PID”
Slow flowrate
Dry pump
protection
End-of-curve
protection
Control of maximum
starts per hour
Filter clogging prevention/Anti jam
Red: PID control 1
Blue: PID control 2
Black: Shared with PID control 1 and 2
J168 ~ J169
J188 ~ J195