Frequency-Related Functions; Frequency Limits - Omron 3G3MX2 User Manual

"A" Group: Standard Functions
3-5-6

Frequency-related Functions

Func.
Code




3. Scenario 3 – The Run command is applied from the operator keypad.
When the [DB] terminal is ON, DC braking is applied after the delay time

set by expires. The motor is in a free-running (coasting) condition.
When the [DB] terminal is OFF again, the inverter output remains OFF.
Option Terminal
Code Symbol

DB
Valid for inputs:
Required settings:
Notes:
• Do not use the [DB] input continuously or for a long time when the DC braking force
setting  is high (depends on the motor application).
• Do not use the [DB] feature for continuous or high duty cycle as a holding brake.
The [DB] input is designed to improve stopping performance. Use a mechanical
brake for holding a stop position.
Frequency Limits - Upper
and lower limits can be
imposed on the inverter out-
put frequency. These limits
will apply regardless of the
source of the speed refer-
ence. You can configure the
lower frequency limit to be
greater than zero as shown in
the graph. The upper limit
must not exceed the rating of
the motor or capability of the machinery. The maximum frequency setting
(A004/A204) takes precedence over frequency upper limit (A061/A261).
"A" Function
Name
Frequency upper limit
2nd frequency upper limit
Frequency lower limit
2nd frequency lower limit
Function State
Name
External DC ON Applies DC injection braking during
Braking deceleration
OFF Does not apply DC injection
braking during deceleration
~
, 
Output
frequency
Upper
A061
limit
Lower-
A062
limit
0
Description
Sets a limit on output frequency
less than the maximum frequency
(/). Range is from fre-
quency lower limit (/) to
maximum frequency (/).
0.0 setting is disabled
>0.0 setting is enabled
Sets a limit on output frequency
greater than zero. Range is start
frequency () to frequency
upper limit (/)
0.0 setting is disabled
>0.0 setting is enabled
Section 3-5
Description
Settable
range
Frequency command
Run Defaults
Mode
EU Units
Edit

0.00 Hz

0.00 Hz
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