Internal Dc Injection Braking (A051 = 01); Internal Dc Injection Braking - Omron JX User Manual

Internal DC Injection Braking (A051 = 01)

•Performs DC injection braking to stop the motor without any terminal operation.
To use this function, set the DC injection braking selection (A051) to 01.
•Set the DC injection braking power in A054.
•Set the frequency for starting DC injection braking in A052.
•If the DC injection braking delay time (A053) is set, the output is shut off when the frequency
reaches the level set in A052 during deceleration, and free-run status arises for the specified
period. DC injection braking starts after the set time elapses.
•Below are edge/level operations in internal DC injection braking.
Edge operation: Giving priority to the DC injection braking time (A055), performs DC injection
Level operation: Giving priority to the RUN command, shifts to normal operation, ignoring the DC
(a) Edge operation
(Example 4-a)
FW
Output frequency
A053
A052
(Example 5-a)
FW
Output frequency
A052
Internal DC Injection Braking (Operates Only at the Set Frequency: A051 = 02)
DC injection braking is enabled when the output frequency becomes lower than the DC injection
braking frequency (A052) during operation.
•Neither external (A051 = 00) nor internal (A051 = 01) DC injection braking is available while this
function is selected.
•Operates only when the RUN command is on.
•DC injection braking starts when both the reference and current frequencies become lower than
A052. (Example 6-a)
braking for the specified period.
DC injection braking is activated for the set time in A055 when the output
frequency reaches the set value in A052 after RUN command (FW) is turned off.
Even if the RUN command is turned on during DC injection braking, the latter is
effective during the set time in A055.
(Example 4-a), (Example 5-a)
injection braking time (A055).
If the RUN command is turned on during DC injection braking, returns to normal
operation, ignoring the set time in A055.
(Example 4-b), (Example 5-b)
Free running
A055
A055
(b) Level operation
(Example 4-b)
FW
Output frequency
A053
A052
(Example 5-b)
FW
Output frequency
A052
4-2 Function Mode
Free running
A055
A055
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