YASKAWA F350587-1 Replacement Solution for Varispeed G7/F7

Product Overview

YASKAWA F350587-1 Replacement & Upgrade Solution for Varispeed G7/F7: Smooth Migration from Legacy AC Drive Systems

The YASKAWA F350587-1 is a genuine AC Drive Control PCB designed for the Varispeed G7 and F7 series variable frequency drives — two of the most widely deployed AC drive platforms in industrial automation worldwide. As these drives age and original control boards reach end-of-life, facilities engineers and maintenance teams face a critical decision: source a verified replacement board or risk extended downtime waiting for obsolete parts. TOPNLMS stocks the F350587-1 to provide a direct, drop-in solution that restores full drive functionality with zero compromise on performance or compatibility.

Whether your plant is running a Varispeed G7 in a pump control application, a Varispeed F7 driving a conveyor or compressor, or a mixed fleet of YASKAWA drives across multiple control cabinets, the F350587-1 control board is the authoritative replacement that maintains your existing wiring topology, parameter settings, and communication architecture without requiring a full drive replacement.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful Varispeed G7 or F7 control board replacement rarely involves the PCB alone. In practice, field engineers conducting a drive retrofit or emergency repair will often assess the condition of surrounding components to prevent repeat failures and ensure the upgraded drive returns to full operational reliability.

During the board swap process, it is common practice to simultaneously inspect and — where necessary — replace the drive’s gate driver board, which interfaces directly with the IGBT power module and is subject to the same thermal and electrical stress cycles as the control PCB. If the Varispeed G7 or F7 unit has accumulated significant run hours, the capacitor bank on the main power board may also warrant replacement to restore full DC bus stability and protect the newly installed F350587-1 from voltage transient damage.

For sites running YASKAWA drives integrated into a broader MEMOBUS or Modbus RTU network — common in water treatment, HVAC, and material handling applications — the communication option card (such as the SI-N3/V or SI-P3/V PROFIBUS card) should be verified for firmware compatibility after the control board replacement. In most cases, the existing option card seats directly into the F350587-1 without modification, preserving the PLC-to-drive communication link and eliminating the need to reconfigure the upstream controller, whether that is a YASKAWA MP2300 machine controller, a Siemens S7-300 PLC, or a Mitsubishi MELSEC Q-series CPU.

Sites that use a YASKAWA DriveWizard Industrial programming cable for parameter backup and restore will find the F350587-1 fully compatible with the standard USB-to-drive interface. Before powering down the faulty drive, technicians should back up all parameters to a laptop or the YASKAWA keypad copy unit (such as the JVOP-182 or JVOP-181 digital operator) to enable rapid parameter restoration after the board swap — a step that can reduce commissioning time from hours to minutes.

In control cabinet environments where the Varispeed G7 or F7 is mounted alongside other automation components — such as YASKAWA Sigma-5 or Sigma-7 servo drives, terminal block assemblies, 24VDC power supply modules, or signal isolators — the board-level replacement approach is particularly advantageous. It avoids the physical disruption of removing and reinstalling a full drive chassis, which in dense cabinet layouts can risk disturbing adjacent wiring, DIN rail components, or I/O terminal strips connected to the plant’s distributed control system.

For facilities managing a mixed fleet that includes both Varispeed G7 and Varispeed F7 drives, TOPNLMS recommends maintaining a small buffer stock of F350587-1 boards as critical spares. This is especially relevant for production lines where a single drive fault can halt an entire process cell — a common scenario in food processing, chemical dosing, and automated assembly applications where YASKAWA drives are deeply embedded in the control architecture.

Retrofit Guidance FAQ

Q: Do I need to rewire the drive after replacing the F350587-1 control board?
A: No. The F350587-1 uses the identical OEM connector layout as the original board. All existing control wiring — including analog input/output signals, digital I/O terminals, and the communication option card — reconnects to the same positions without modification.

Q: Will my existing Modbus RTU or PROFIBUS configuration be preserved?
A: The communication protocol configuration is stored partly in the drive parameters and partly in the option card. After installing the F350587-1, restore your backed-up parameters via DriveWizard or the keypad copy function. The option card (e.g., SI-N3/V for Modbus, SI-P3/V for PROFIBUS) reseats directly and resumes normal fieldbus communication once parameters are restored.

Q: How do I back up parameters before the board swap?
A: Use the YASKAWA DriveWizard Industrial software with a USB programming cable, or use the JVOP-182 / JVOP-181 digital operator’s parameter copy function to save all drive settings to the keypad memory before powering down.

Q: Does the F350587-1 fit both the G7 and F7 drive chassis?
A: Yes. The F350587-1 is compatible with both the Varispeed G7 and Varispeed F7 series. Confirm your drive’s frame size and internal layout against the board mounting points before installation.

Q: What if my drive has additional faults after the board replacement?
A: A control board fault is often accompanied by secondary issues such as a degraded gate driver board or aging DC bus capacitors. If fault codes persist after the F350587-1 swap, inspect the power board and gate driver assembly. TOPNLMS technical support can assist with fault code diagnosis.

Q: Can I install the F350587-1 without a YASKAWA-certified technician?
A: Board-level replacement is a standard maintenance procedure for qualified electrical engineers and drive technicians. Always follow YASKAWA’s lockout/tagout procedures and discharge the DC bus capacitors fully before handling internal drive components.

Warranty Assurance

Every YASKAWA F350587-1 shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to dispatch, each board undergoes functional inspection and verification to confirm it meets OEM specifications. In the event of a confirmed defect within the warranty period, TOPNLMS will arrange a replacement unit or provide a full refund — whichever resolution best minimizes your operational disruption.

TOPNLMS ships from Xiamen, China, with express international freight options available to minimize transit time for urgent replacement requirements. Orders are typically processed and dispatched within 1–3 business days. For time-critical plant shutdowns or scheduled maintenance windows, contact our sales team directly to confirm stock availability and arrange priority dispatch.

Our after-sales support team is available to assist with installation guidance, parameter restoration advice, and fault code interpretation throughout the warranty period. We understand that industrial drive failures rarely happen at convenient times — our goal is to get your system back online as quickly as possible.