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4. Parameter description
Parameter
4.59 DC
injection
brake function before starting (P.242~P.244)
P.242 “
DC
injection
brake function before starting selection
”
P.243 “
DC
injection
brake time before starting
”
P.244 “
DC
injection
brake
voltage
before starting
”
Related parameters
P.13
“
Starting frequency
”
Parameter
Factory setting
Setting range
Remarks
242
0
0~1
---
243
0.5s
0~60s
---
244
4%
0~30%
---
<Setting>
• If P.242=0, the DC injection brake function before starting is not selected. If P.242=1, the DC brake
injection function before starting is selected. When the output frequency reached the starting
frequency (P.13), a DC voltage (P.244) will be injected into the motor windings by the inverter,
which is used to lock the motor rotor. The DC brake operation will last a period (the set value of
P.243), the motor will start.
As shown as follows:
time
time
P.243
P.13
P.244
Output
frequency
DC injection
brake voltage
Note: This function is valid in V/F curve. It means P.300 must be set to 0.
4.60 Bypass-inverter switchover function (P.247~P.250)
P.247 “MC switch interlock time”
P.248 “Start waiting time”
P.249 “Automatic switchover frequency from inverter to bypass operation”
P.250 “Automatic switchover frequencyrange from bypass to inverter operation”
