MD280 User Manual Description of Function Codes
- 127 -
):DLWLQJWLPHRIVWRS'&EUDNLQJ
When the running frequency decreases to the initial frequency of stop DC braking, the
AC drive stops output for a certain period and then starts DC braking. This prevents
faults such as overcurrent caused due to DC braking at high speed.
)6WRS'&EUDNLQJFXUUHQW
7KLVSDUDPHWHUVSHFL¿HVWKHRXWSXWFXUUHQWDW'&EUDNLQJDQGLVDSHUFHQWDJHUHODWLYH
to the base value.
)6WRS'&EUDNLQJWLPH
7KLVSDUDPHWHUVSHFL¿HVWKHKROGLQJWLPHRI'&EUDNLQJ,ILWLVVHWWR'&EUDNLQJLV
cancelled.
7KHVWRS'&EUDNLQJSURFHVVLVVKRZQLQWKHIROORZLQJ¿JXUH
Figure 6-14 Stop DC braking process
Time t
Initialfrequencyof
stop DC braking
Time t
Effective value of
output voltage
Stop DC braking
RUN
command
Waiting timeof
stop DC braking
Stop DC
braking time
Output
frequency Hz
Function Code Parameter Name Setting Range Default
F4-15 Brake use ratio 0%–100% 100%
It is valid only for the AC drive with internal braking unit and used to adjust the duty ratio of
the braking unit. The larger the value of this parameter is, the better the braking result will
EH+RZHYHUWRRODUJHUYDOXHFDXVHVJUHDWÀXFWXDWLRQRIWKH$&GULYHEXVYROWDJHGXULQJWKH
braking process.
Group F5: Au[iliary Functions
Function Code Parameter Name Setting Range Default
F5-00 JOG running frequency
+]WRPD[LPXP
IUHTXHQF\)
2.00 Hz
F5-01 JOG acceleration time 0.0–300.0s 20.0s
efesotomasyon.com