Schneider Electric 58 TRX User Manual
Altivar
®
58 TRX AC Drives
Type FVC Adjustment Parameters
71
09/2003
©
2000–2003 Schneider Electric All Rights Reserved
PID Regulator
This function is used to regulate a process with a reference and a feedback given by a sensor. A speed
input gives an initial (or predictive) setpoint for start-up. In PID regulator mode the ramps are linear, even
if they are configured differently. PID Regulator mode is active if an AI input is assigned to PID Feedback.
input gives an initial (or predictive) setpoint for start-up. In PID regulator mode the ramps are linear, even
if they are configured differently. PID Regulator mode is active if an AI input is assigned to PID Feedback.
PID Regulator parameters:
• Speed Input: digital setpoint via communication link; analog input AI3.
• PID Setpoint: digital setpoint via communication link; 2 or 4 setpoints preset via logic input; analog
Input AI1 (± AI2 ± AI3).
• PID Feedback: analog input AI2 or AI3.
• Manual Setpoint (speed regulation mode): analog input AI3.
• Integral shunting: logic input LI: integral shunted if LIx=1.
• Auto/manual:
— Logic input LI for switching operation to speed regulation (man) if LIx = 1, or PID regulation (auto)
if LIx = 0.
In automatic mode the following actions are possible:
— Adapt the setpoint input to the process feedback: GAIN (PrG) and OFFSET (rEO).
— Correct PID inversion.
— Adjust the proportional, integral, and derivative gain (RPG, RIG and RdG).
— Use the “alarm” on logic output if a threshold is exceeded (Max. feedback, Min. feedback, and
— Correct PID inversion.
— Adjust the proportional, integral, and derivative gain (RPG, RIG and RdG).
— Use the “alarm” on logic output if a threshold is exceeded (Max. feedback, Min. feedback, and
PID error).
— Assign an analog output for the PID setpoint, PID feedback, and PID error.
— Limit the action of the PID according to the speed, with an adjustable base and ratio:
— Limit the action of the PID according to the speed, with an adjustable base and ratio:
— Apply a ramp to establish the action of the PID on starting (AC2) and stopping (dE2).
— The motor speed is limited between LSP and HSP and is displayed as a percentage.
— The motor speed is limited between LSP and HSP and is displayed as a percentage.
Predictive
speed input
speed input
PID
setpoint
setpoint
PrG
RPG
RIG
RdG
X
rEO
Offset
PID
feedback
feedback
Integral shunting
Low-pass filter
AC2
dE2
Run
command
PIC
X±1
PSr
Multiplier
ACC
dEC
Linear ramp
Manual setpoint
ACC
dEC
Auto / man
Multiplier
Auto
Man
Reference
PID
reversal
Deadband
f (speed)
Ramp
+
+
+
Ð
PLr
PLb
+
+
PSP
PAH
PAL
Min / max
alarm
PEr
PID
regulator
Error alarm
Ramp
P
ID
di
ag
ra
m.
ep
s
Speed
Deadband