Braking Start Frequency (F20/A09). However, if the Stop Frequency (F25) is higher than the DC In-
jection Braking Frequency (F20/A10), DC injection braking is started from the time the output fre-
quency reaches the Stop Frequency (F25), and is performed for the period of the DC Injection Brak-
ing Time (F22/A11).
•
If, during DC injection braking, the set frequency becomes higher than the DC Injection Braking Fre-
quency (F20/A10) + 2 Hz, the Starting Frequency (F23/A12) or the maximum value set in the Stop
Frequency (F25/A63), the inverter cancels DC injection braking and returns to normal operation. DC
injection braking is also canceled when the RUN command is OFF.
RUN command
Starting frequency
Bold solid line ... output frequency, solid line ... frequency reference
DC injection braking current
DC Injection Braking Level (F21/A20)
F20/A09+2Hz
Stop Frequency
on
off off
DC Injection Braking Start Frequency (F20/A09)
RUN command
Starting frequency
Bold solid line ... output frequency, solid line ... frequency reference
DC injection braking current
DC Injection Braking Level (F21/A20)
F20/A09+2Hz
Free run
Stop Frequency
on
off off
DC Injection Braking Start Frequency (F20/A09)
• When “0: Edge operation” is selected for External DC Injection Braking Edge/Level Selection
(E115), DC injection braking operates for the period set at the DC Injection Braking Time (F22/A11)
after the conditions to start DC injection braking are established.
7 Other Functions
7-67
M1 Series Standard Type User's Manual (I669)
7-5 DC Injection Braking Function
7
7-5-1 DC Injection Braking (DB)
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