OMRON 3G3SV Inverter Practical Manual

The digital operator is an optional accessory that can be connected to the frequency converter through a dedicated cable (1 m or 3 m) and supports handheld operation or panel embedded installation. Its core functions include:

DRIVE mode: Run operation (RUN, STOP, JOG, FWD/REV keys), which can change the frequency in real time.

PRGM mode: parameter reading and modification. Switch the display group (frequency command, output frequency, output current, fault record) through the DsPL key.

Monitoring function: Display output frequency, output current, and operating status.

Fault display: When a fault occurs, display a code (such as OC, OV) and store the latest fault (constant No.48).

Parameter access hierarchy:

Constant No.00 (password/function group selection):

=0: Read only the first set of functions (No.0~No.19)

=1: Read and write the first group

=2: Read and write the first and second groups (No.0~No.29)

=3: Read and write the first, second, and third groups (No.0~No.59)

=6: Clear fault records

=8: Parameter initialization (factory values)

=9: 3-wire sequential initialization

Typical operation example: Change the acceleration time (No.9) from 10 seconds to 5 seconds:

Press the DRIVE key to switch to PRGM mode.

Press the DsPL key until "No.00" is displayed.

Press the up button to adjust to No.09, and press the READ button.

Use the up/down keys to change 10.0 to 5.0, and press the WHITE key.

Displaying 'END' indicates successful writing.

Press the DRIVE key to return to the running mode.

Notes:

Some constants (such as frequency commands) can be changed during operation, but most parameters need to be modified during shutdown.

If the set value exceeds the range or violates constraints (such as No.32 and No.33 not being set in descending order), the set value will flash for 3 seconds and return to its original value.

Chapter 4: Core Parameter Optimization - Making the Motor Work in the Best State

4.1 V/f characteristic settings (No.2~No.8)

The V/f curve determines the relationship between output voltage and frequency. The factory setting is 60 Hz saturation type, suitable for 60 Hz standard motors. Customizable:

No.2 maximum frequency (50~400 Hz)

No.3 maximum voltage (0~255 V)

No.4 fundamental frequency (usually set as the rated frequency of the motor)

No.5 intermediate frequency, No.6 intermediate voltage

No.7 minimum output frequency, No.8 minimum voltage

Constraint conditions: No.2 ≥ No.4>No.5 ≥ No.7. Violating constraints will result in the rejection of set values.

4.2 Acceleration and deceleration time (No.9~No.12)

No.9 acceleration time 1, No.10 deceleration time 1; No.11 and No.12 are the second acceleration and deceleration times (which can be switched through terminal 8).

Set the range of 0.0~600.0 seconds, indicating the time required to accelerate from 0 Hz to the maximum frequency (No.2).

The actual addition and subtraction time to any frequency is calculated proportionally.

4.3 Multi speed and Jogging (No.13~No.17, No.41~No.44)

By combining external terminals 5, 6, 7, and 8, a maximum of 9 speed segments can be achieved. The speed frequencies of each section are set from No.13 to No.17 and No.41 to No.44, respectively. The jog frequency is set by No.17, and the jog command can be triggered by terminal 7 or the operator JOG key.

4.4 Frequency command gain/bias (No.22, No.23)

When the simulated output frequency (0~10V or 4~20mA) is not linear with the desired output frequency, it can be adjusted:

No.22 Gain: The multiplier of the output frequency relative to the maximum frequency when the frequency command is 10V (or 20mA) (0.01~2.00, factory 1.00)

No.23 bias: The offset of the output frequency at 0V (or 4mA) relative to the maximum frequency (-1.00~1.00, factory 0.00)

For example, 0V is required to correspond to 6 Hz (10%), and 8V is required to correspond to 60 Hz (100%). If the maximum frequency is set to 60 Hz, then bias=6/60=0.10, gain=60/60/(8/10)=1.25.

4.5 Torque Boosting and Automatic Torque Compensation

The voltage increase at low speed (determined by the minimum voltage No.8 of V/f) can compensate for the stator resistance drop. However, excessive lifting can cause the motor to overheat.

Full range automatic torque compensation (No.29): automatically adjusts the V/f ratio according to the load torque, with a factory value of 1.0. When the motor capacity is smaller than the frequency converter capacity and high starting torque is required, it can be appropriately increased (up to 3.0). Usually no adjustments are needed.

4.6 DC Braking (No.26~No.28)

No.26 DC braking current (0~110% rated current of frequency converter)

No.27 DC braking time during shutdown (0.0~5.0 seconds, factory 0.5 seconds)

No.28 DC braking time during startup (0.0~5.0 seconds, factory 0.0 seconds)

Used for precise positioning before parking or starting. The larger the braking current, the stronger the braking torque, but the motor also heats up more.

4.7 Electronic thermal overload protection (No.18, No.19)

No.18 Choose motor type: standard motor (0) or constant torque motor (1), or disable protection (set as x1).

The rated current of motor No.19 (unit: 0.1 A) must be set according to the motor nameplate, otherwise the protection will fail or malfunction.