Every maintenance engineer should memorize or bookmark these parameter numbers:
| Parameter | Function | Typical Setting | | :--- | :--- | :--- | | Pr. 1 | Maximum Frequency | 50 / 60 Hz / 120 Hz | | Pr. 2 | Minimum Frequency | 0 Hz | | Pr. 3 | Base Frequency (Motor rated) | 50 Hz or 60 Hz | | Pr. 7 | Acceleration Time | 5.0 sec (10 sec for high inertia) | | Pr. 8 | Deceleration Time | 5.0 sec | | Pr. 9 | Electronic Thermal O/L Relay | Motor FLA (e.g., 3.5A) | | Pr. 79 | Operation Mode Selection | 0 (Panel), 2 (External), 3 (Comm) | | Pr. 80 / 81 | Motor Capacity & Poles | Match your motor nameplate |
The manual covers the following core capabilities of the VFG-L: mitsubishi vfgl manual
Before we conclude, here are verbatim safety warnings paraphrased from the official manual. Ignoring these will damage the drive or injure personnel.
The most common mistake with VFGL drives is incorrect wiring. Every maintenance engineer should memorize or bookmark these
Pro Tip from the manual: The VFGL uses a sink logic default (terminal SD is common). If you are using a PLC with positive logic, you must change the internal jumper or parameter Pr. 60.
Before diving into the manual specifics, it is crucial to understand what you are working with. The most common mistake with VFGL drives is incorrect wiring
The VFGL (often stylized as FR-VFGL) is a transistorized inverter designed specifically for variable torque and constant torque applications. Unlike modern compact drives, the VFGL series is known for:
Note on Discontinued Status: Mitsubishi officially discontinued the VFGL series in the mid-2000s, replacing it with the FR-A700 and later FR-A800 series. However, thousands of these units are still running in the field today, making the manual a critical resource for maintenance teams.