4-28
4-2 Function Mode
4
Functions
ï‚¢Internal DC Injection Braking (Operates Only at the Set Frequency) (A051: 02)
•DC injection braking can be applied when the output frequency becomes lower than the DC
injection braking frequency (A052).
•Neither (2) external nor (3) internal DC injection braking is available while this function is selected.
•Operates only when the RUN command is turned on.
•DC injection braking starts when both the reference and current frequencies become lower than
A052. (Example 7-a)
•When the reference frequency exceeds the A052 set value by 2 Hz or more, DC injection braking
is released and the output returns to normal. (Example 7-a)
•If the reference frequency is "0" when the operation starts with analog input, the initial operation is
DC injection braking because both the reference and current frequencies are "0". (Example 7-b)
•If the RUN command is turned on with the frequency reference established (or a value larger than
the A052 setting is input), the initial operation is set to normal output.
•The operation to return to normal varies depending on the setting of DC injection braking power
A054.
Frequency Limit
•You can set both the upper/lower limits to the output frequency.
(Example 7-a) (Example 7-b)
ON
RUN
command
A052
Frequency
reference
Output
frequency
ON
RUN
command
A052
Frequency
reference
Output
frequency
(a) Edge operation (b) Level operation
ON
RUN
command
A052
Frequency
reference
Output
frequency
A053
ON
RUN
command
A052
Frequency
reference
Output
frequency
Parameter No. Function name Data Default setting Unit
A061 Frequency upper limit
0.0/Frequency lower limit [A062] to
Max. frequency [A004]
0.00
Hz
A261 *2nd frequency upper limit
0.0/2nd frequency lower limit [A262]
to 2nd max. frequency [A204]
0.00
A062 Frequency lower limit
0.0/Starting frequency to Frequency
upper limit [A061]
0.00
A262 *2nd frequency lower limit
0.0/Starting frequency to 2nd
frequency upper limit [A261]
0.00
Related functions C001 to C008
To Next Page
Loading...
Need help?
General