J1 Codes (Pid Control 1) - Fuji Electric FRENIC-HVAC User Manual

6.3.8

J1 codes (PID control 1)

J101 PID Control 1 (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 setting range: 0 to 2
PID process control block diagram
SV: command value FB: feedback value
Speed command
selection
PID control 1
Filter
Arithmetic unit
Addition,
difference
Average
Selection of
maximum
Selection of
minimum
PID control 2
Filter
PID1-FB
Selection of
maximum
- 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).
J101, J201
PID1 Warning
PID1 Warning
judgment
output
PID1 PV failure
PID1 Failure
judgment
output
Deviation
Selection of
maximum
Selection of
minimum
PID2 Unit/scale
Feedback value
PID 2 Warning
judgment
PID2 PV failure
judgment
Maximum hysteresis width, minimum
hysteresis width
J202 (PID Control 2 (Mode selection))
Data for
0 Disable
Enable (Process control, normal operation.
1
When SV > PV, MV increases.)
Enable (Process control, inverse operation.
2
When SV < PV, MV increases)
Red: PID control 1
Blue: PID control 2
Black: Shared with PID control 1 and 2
PID1 Unit/scale
Anti-reset wind-up
PID control 2/1
switchover
Integration/derivati
"PID 2/1"
on reset
Integration hold
adjuster
Normal-operation/reverse-operation
selection IVS
P gain
Integration
time
Derivation
time
PID2 Warning
output
PID2 Failure
output
6-182
Function
Frequency
command
Cancel PID control
"Hz/PID"
Limiter
Upper limit
PID
Slow flowrate
Limiter
Lower limit
Dry pump
protection
End-of-curve
protection
Control of maximum
starts per hour
J168 ~ J169
Filter clogging prevention/Anti jam
J188 ~ J195