Mitsubishi FR-A700 Inverter — Precision Drive for Cranes

Mitsubishi FR-A700 inverters deliver precision motor speed control to within ±0.01% with encoder feedback, serving demanding applications in cranes, lifts, winding machines, and material handling systems. Introduced in 2006 with 200V, 400V, and 600V input options, the FR-A700 remains a trusted workhorse in Malaysian heavy industry. Flextech Industrial supplies FR-A700 replacement units and provides migration guidance to the current FR-A800 series.

Key Features and Performance

Mitsubishi FR-A700 inverters achieve ±0.01% speed accuracy in closed-loop vector control mode with encoder feedback, and ±0.5% in sensorless vector mode. This level of precision makes the FR-A700 the drive of choice for crane hoisting, elevator traction, centre-driven winders, and extruder screw speed control.

The FR-A700 series spans three voltage classes: 200V (0.4 kW to 55 kW), 400V (0.75 kW to 630 kW), and 600V (55 kW to 500 kW). The 600V class specifically addresses Malaysian mining and heavy process applications where higher distribution voltages reduce cable costs.

Overload capacity on the Mitsubishi FR-A700 reaches 200% for 3 seconds and 150% for 60 seconds, providing the torque reserves needed for crane acceleration and winder tension transients. Zero-speed torque holding is available in vector control mode, critical for crane hoist brake sequencing.

The FR-A700 includes an option slot system supporting plug-in encoder feedback cards, communication cards (CC-Link, PROFIBUS-DP, DeviceNet), and safety relay modules. Up to three option cards can be installed simultaneously, enabling encoder feedback, network communication, and safety monitoring in a single drive.

Built-in position control on the Mitsubishi FR-A700 supports simple positioning applications without an external motion controller. The drive accepts A/B/Z encoder signals and executes point-to-point moves with acceleration and deceleration ramp shaping.

Technical Specifications

Applications in Malaysian Industry

Mitsubishi FR-A700 inverters operate across Malaysia’s heavy industrial sectors. Port facilities in Port Klang and Tanjung Pelepas use the FR-A700 for container crane hoist and traverse drives. Steel processing plants employ the FR-A700 for coil winding tension control where constant torque output is essential.

Manufacturing plants under NIMP 2030 modernisation retain FR-A700 drives on existing crane systems while budgeting for phased FR-A800 upgrades. Rubber processing facilities in Malaysia use the FR-A700 for calender roll speed synchronisation. Mining operations in Sarawak and Sabah deploy the 600V FR-A700 variant for conveyor and crusher motor control.

Mitsubishi FR-A700 vs FR-A800 Upgrade Path

Mitsubishi FR-A800 inverters replace the FR-A700 with enhanced features including STO SIL3 safety, improved sensorless vector performance, and Ethernet communication options. The FR-A800 maintains compatible mounting dimensions for most power ratings, and parameter migration is supported through FR Configurator2. Existing encoder cards and communication cards from FR-A700 installations are not cross-compatible, requiring new option cards during migration. Flextech Industrial supplies both FR-A700 replacement stock and FR-A800 upgrade kits.

Why Source from Flextech Industrial

Flextech Industrial stocks Mitsubishi FR-A700 replacement drives in Malaysia for urgent like-for-like replacements in crane, lift, and winding systems. Our drive engineers provide application sizing, encoder card selection, and parameter backup services. We support both FR-A700 maintenance and FR-A800 migration projects with on-site commissioning assistance.

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Frequently Asked Questions

What encoder types does the Mitsubishi FR-A700 support?

Mitsubishi FR-A700 inverters support incremental encoders with A/B/Z channels through the FR-A7AP option card. Line driver and open collector encoder outputs are both compatible. Encoder resolution up to 16,384 pulses per revolution is supported for high-precision speed regulation.

Can the FR-A700 operate a crane hoist motor safely?

Mitsubishi FR-A700 inverters include crane-specific functions such as pre-torque (torque prove before brake release), mechanical brake sequencing, and over-speed detection. The 200% overload capacity provides adequate torque for loaded hoist acceleration from standstill.

Is the Mitsubishi FR-A700 still manufactured?

Mitsubishi Electric has transitioned production to the FR-A800 series. FR-A700 units are available through distributor replacement stock. Flextech Industrial maintains FR-A700 inventory in Malaysia for critical replacement situations where immediate like-for-like swap is required.

What is the cost of migrating from FR-A700 to FR-A800 in Malaysia?

Migration cost depends on the number of drives, power ratings, and option cards required. Flextech Industrial provides free migration assessments for Malaysian installations, including mounting compatibility checks, parameter conversion, and option card specifications. Contact our team for a detailed quotation.

How do I back up FR-A700 parameters before replacement?

Mitsubishi FR-A700 parameters can be backed up using the FR-PU07 keypad (parameter copy function) or FR Configurator2 software via RS485 connection. The FR-PU07 keypad stores one complete parameter set and can clone it to a replacement drive without power to the original unit.