Operating Instructions

Appendix A: Parameter Reference List
Siemens Building Technologies, Inc. 149
P1120 Ramp-up time
Min: 0.00 Def: 10.00 Max: 650.00
Level 1
Details: Setting the ramp-up time too short can cause the inverter to trip (overcurrent).
If an external frequency setpoint with set ramp rates is used (for example, from a PLC), the best way to achieve
optimum drive performance is to set ramp times in P1120 and P1121 slightly shorter than those of the PLC.
P1121 Ramp-down time
Min: 0.00 Def: 10.00 Max: 650.00
Level 1
Details: Setting the ramp-down time too short can cause the inverter to trip (overcurrent (F0001)/overvoltage (F0002)).
P1135 OFF3 ramp-down time
Min: 0.00 Def: 5.00 Max: 650.00
Level 2
Details: Defines ramp-down time from maximum frequency to standstill for OFF3 command.
Note: This time may be exceeded if the VDC_max. level is reached.
P1140[2] BI: RFG enable
Min: 0.00 Def: 1.0 Max: 4000.0
Level 3
Index: P1140[0]: IN000 (AUTO) 1st command data set (CDS) P1140[1]: IN001 (HAND) 2nd command data set (CDS)
P1141[2] BI: RFG start
Min: 0.00 Def: 1.0 Max: 4000.0
Level 3
Index: P1141[0]: IN000 (AUTO) 1st command data set (CDS) P1141[1]: IN001 (HAND) 2nd command data set (CDS)
P1142[2] BI: RFG setpoint
Min: 0.00 Def: 1.0 Max: 4000.0
Level 3
Index: P1142[0]: IN000 (AUTO) 1st command data set (CDS) P1142[1]: IN001 (HAND) 2nd command data set (CDS)
P1200 Flying start
Min: 0 Def: 0 Max: 6
Level 2
Details: Starts inverter onto a spinning motor by rapidly changing the output frequency of the inverter until the actual motor
speed has been found. Then, the motor runs up to setpoint using the normal ramp time.
Enum: 0 =Flying start disabled
1 =Flying start is always active, start in direction of
setpoint
2 =Flying start is active if power on, fault, OFF2, start
in direction of setpoint
3 =Flying start is active if fault, OFF2, start in direction
of setpoint
4 =Flying start is always active, only in direction of
setpoint
5 =Flying start is active if power on, fault, OFF2, only in
direction of setpoint
6 =Flying start is active if fault, OFF2, only in direction
of setpoint