Omron SYSDRIVE MX2 SERIES, User Manual

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7 - 95
7 Other Functions
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
7-9 DC
Inject
ion
Braking
Fu
nct
ion
7
7-9
-1 DC
Injection Braking (DB)
Note During free running and during DB operation, the output frequency is 0.
Use this method to control DC injection braking only by changing the set frequency.
Set the DC Injection Braking Selection (A051) to 02 (Operates only via set frequency).
• When A051 is set to 02, the external DC injection braking terminal function is disabled.
• If both the set frequency and the output frequency are equal to or lower than the A052 value with the
RUN command ON, the inverter starts DC injection braking. (Example 1-a)
• When the set frequency becomes
+
2 Hz higher than the A052 value, the inverter releases DC injec-
tion braking and returns to normal output. (Example 1-a)
• The inverter releases DC injection braking if the RUN command turns OFF with DC injection enabled.
(Example 1-b)
• If the set frequency starts from 0 via analog input etc., the inverter resets both the set frequency and
the output frequency and starts operation with DC injection braking. (Example 1-b)
• If the RUN command turns ON via analog input etc. with the set frequency larger than the A052
value, the inverter starts operation with the normal frequency. (Example 1-a)
Example 5-a. During stop (with A053 setting) Example 5-b. During stop (with A053 setting)
Example 6-a. During stop (A053 = 0.0) Example 6-b. During stop (A053 = 0.0)
Controlling DC Injection Braking Only via Set Frequency (A051 = 02)
Example 1-a Example 1-b
(a) Edge operation (A056 = 00) (b) Level operation (A056 = 01)
A052
A053
A055
FW input
Output
frequency
Free running
A052
A053 A055
FW input
Output
frequency
Free running
A052
A055
FW input
Output
frequency
A052
A055
FW input
Output
frequency
A052
ON
FW input
Frequency
reference
Output
frequency
A052
ON
FW input
Frequency
reference
Output
frequency