Operating instructions

5. SYSTEM PARAMETERS International English
MICROMASTER 420 Operating Instructions 87
6SE6400-5AA00-0BP0
Parameter
Number
Parameter Name
Min
Max
[Default]
Units
♦
♦♦
♦P0003 User
Access Level
♦
♦♦
♦P0004 Setting
♦
♦♦
♦Changeable
♦
♦♦
♦Status
Setpoint
P2260
KK
Setpoint Source
P2253
KK
Feedback Source
P2264
Kp Tn
P Gain
P2280
I Gain
P2285
x
y
r2294
PID Outpu
t
PID in upper limit/lower limit
P53.10/P53.11
+
PID Output UpperLimit
P2291
PID Output Lower Limit
P2292
P2293
Accel/Decel time of PID limits
Ramp - up time for
Setpoint
P2257
Ramp down time for
Setpoint
P2258
+
-
Transducer
Type
P2271
Error
P2273
x
y
Maximum
feedback threshold
P2267
Minimum
feedback threshold
P2268
Parameter P2253 allows the user to select the source of the PI setpoint. Normally a digital PI setpoint is selected using either a Fixed PI
setpoint or an active setpoint. The most common settings are as follows:
755 = Analog input 1
2224 = Fixed PI setpoint (see P2201 to P2207)
2250 = Active PI setpoint (see P2240)
Ramp up time for PI setpointP2257
Sets the ramp up time for the PI setpoint.
PI Setpoint (%)
0
100 %
time (s)
Ramp up time
(P2257)
Setting the ramp – up time too short may cause the inverter to trip, on overcurrent for
example.
Note.
If PI control is enabled, the normal ramp-up time (P1120) is disabled.
The PI ramp time is only effective on the PI setpoint and only active when the PI setpoint is
changed, or when a RUN command is given (when the PI uses this ramp to reach its value
from 0%).
0
650
[1]
s
2
22
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