Operating instructions

6 Commissioning Issue 10/06
MICROMASTER 430
52 Operating Instructions (Compact)
6.3.16.9 PID controller
Process values can be controlled via PID control (e.g. pressure, liquid level). The
process setpoint (PID setpoint) can be a fixed setpoint (e.g. PID-FF) or an analog
setpoint (e.g. analog input). The current value of the process is determined by a
sensor, which is connected to the inverter via an analog input.
NOTE
• PID-FF or PID-MOP are build up like FF (refer to Section 6.3.9) or MOP (refer
to Section 6.3.8).
• The parameters of PID-FF are in the parameter range P2201 - P2228.
• For the PID-MOP parameters the range P2231 - r2250 is valid.
BI: Enable PID controlle
r
PID mode Allows user to enable/disable the PID controller. Setting to 1 enables the PID
controller. Setting 1 automatically disables normal ramp times set in P1120 and P1121 and
the normal frequency setpoints.
CI: PID setpoint
Defines setpoint source for PID setpoint input.
CI: PID trim source
Selects trim source for PID setpoint. This signal is multiplied by the trim gain and added to
the PID setpoint.
Ramp-up time for PID setpoint
Sets the ramp-up time for the PID setpoint.
Ramp-down time for PID setpoint
Sets ramp-down time for PID setpoint.
CI: PID feedback
Selects the source of the PID feedback signal.
Max. value for PID feedback
Sets the upper limit for the value of the feedback signal in [%].
P2268 =...
Min. value for PID
f
eedback
Sets lower limit for value of feedback signal in [%].
CO: PID error
Displays PID error (difference) signal between setpoint and feedback signals in [%].
PID derivative time
Sets PID derivative time.
P2274 = 0:
The derivative term does not have any effect (it applies a gain of 1).
PID proportional gain
Allows user to set proportional gain for PID controller.
PID integral time
Sets integral time constant for PID controller.
PID output upper limit
Sets upper limit for PID controller output in [%].
P2292 =...
PID output lower limit
Sets lower limit for the PID controller output in [%].
0.0
0.0
0.0
1.00 s
1.00 s
755.0
100.00 %
0.00 %
3.000
0.000 s
100.00 %
0.00 %
P2291 =...
P2285 =...
P2280 =...
0.000
P2274 =...
r2273 =...
P2200 =...
P2253 =...
P2254 =...
P2257 =...
P2258 =...
P2264 =...
P2267 =...