Siemens Micromaster 420 Operating Instruction page 88

International English
Parameter
Number
P2258 Ramp-down time for PI setpoint
Sets the ramp-down time for the PI setpoint.
Setting the ramp down time too short can cause the inverter to trip on (overvoltage
(F0002)/overcurrent (F0001))
Note
If PI control is enabled, the normal ramp-down time (P1121) is disabled.
The PI setpoint ramp is only enabled effective on PI setpoint changes. The ramp times
used after OFF1 & OFF3 are defined in P1121 and P1135 respectively
r2260 CO: PI setpoint
Displays the total active PI setpoint in %.
P2264 CI: Source of PI feedback
Selects the source of the PI feedback signal. The most common settings are as follows:
755 =
Note 1
When the analog input is selected, it is possible to implement offset and gain using
parameters P756 – P760.
Note 2
Refer to "Using BICO" description for further details of other settings.
P2265 PI: feedback filter timeconst.
Defines PI feedback filter time constant.
r2266 CO: PI feedback
Displays PI feedback signal
88
Parameter Name
Setpoint (%)
100 %
0
Ramp - down time
(P1121)
Analog input 1
5. SYSTEM PARAMETERS
Min
Max
[Default]
Units
0
650
[1]
s
time (s)
-
-
[-]
%
0
2294.0
[755]
-
0
60
[0]
s
-
-
[-]
%
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
♦ ♦ ♦ ♦ P0003 User
Access Level
♦ ♦ ♦ ♦ P0004 Setting
♦ ♦ ♦ ♦ Changeable
♦ ♦ ♦ ♦ Status
2
22
'•'
2
22
2
22
'•'
2
22
'•'
2
22