Bosch Rexroth HDS03.2-W100N-HT20-01-FW AC Servo Drive

HDS03.2-W100N-HT20-01-FW: Stop the Bleeding — Your Replacement Drive Ships Today

The axis is faulted. The line is cold. Your shift supervisor is already on the phone. You’ve isolated the fault to the Bosch Rexroth HDS03.2-W100N-HT20-01-FW — a 100A DIAX04-platform servo drive that runs everything from CNC spindle axes to heavy-duty press gantries. We have this exact unit physically on the shelf in Xiamen. Not inbound. Not on order. On the shelf, tested, and ready to pack the moment you confirm.

Every hour of unplanned downtime on a servo-driven machine costs between $5,000 and $50,000 depending on your process. A three-day wait for a factory-sourced spare is not a plan — it’s a loss. Our model is simple: you identify the failed part, we ship it the same day, and your maintenance team has a replacement in hand before the OEM even processes your RFQ.

⚡ URGENT REQUIREMENT? Contact: [email protected] | WhatsApp: +86 18359268345

Quick Technical Datasheet

Troubleshooting & Replacement Tips

Ten years of field calls on DIAX04 hardware teaches you where these drives actually fail — and more importantly, where they don’t. Before you commit to a swap, run through this checklist. It will save you from replacing a healthy drive or, worse, killing a new one by missing an upstream fault.

Fault Code Breakdown — What the Display Is Actually Telling You:

• F2 — DC Bus Undervoltage: Measure the DC bus at the drive’s power terminals before condemning the HDS. A healthy HVR/HVE supply should hold 540–750 VDC under load. If the bus is sagging, the problem is the power supply — not the drive. Replacing the HDS03.2 with a weak bus will fault the new unit within seconds of enabling.
• F3 — DC Bus Overvoltage: Typically caused by a regenerative braking event with no ballast resistor capacity. Check the HVR’s braking resistor circuit. If the bus spikes above 800 VDC during deceleration, the drive’s overvoltage protection trips. The drive itself is usually undamaged — but if F3 appears at rest with no motion command, the drive’s internal capacitor bank has failed. That’s a confirmed HDS03.2 replacement.
• F8 — Output Stage Overcurrent / Short: Disconnect the motor power cable at the drive’s X6 output connector. Power up the drive alone. If F8 clears, the fault is in the motor winding or cable — megger the motor phase-to-phase and phase-to-earth before reconnecting. If F8 persists with no motor connected, the IGBT output bridge is shorted. The drive is dead. Ship the HDS03.2-W100N-HT20-01-FW.
• F218 / F219 — Encoder / Feedback Signal Loss: The most misdiagnosed fault on this platform. In field experience, 65–70% of F218/F219 faults trace back to the feedback cable (IKS or IKG series), not the drive. Swap the cable to a known-good spare first. If the fault follows the drive when swapped to a different axis, the drive’s feedback receiver circuit has failed — confirmed HDS replacement required.
• No Fault, Axis Won’t Enable: Check the enable chain at X3 connector. Pins AS1/AS2 carry the safety relay contacts — 24 VDC must be present for the drive to release the axis. A tripped safety relay, broken wire, or failed E-stop contact will prevent enabling with no drive fault code generated. Confirm 24 VDC on the enable input with a meter before assuming drive failure.

Replacement Procedure — Configuration Steps That Cannot Be Skipped:

1. Export parameters from the failed drive before removal. If the drive still powers up (even partially), connect IndraWorks DS or WinBlow and export the full parameter set. If the drive is completely dead, retrieve parameters from the CNC control’s backup memory or your machine documentation. The HDS03.2 does not auto-detect motor parameters — running with factory defaults on a 100A drive is a commissioning risk.
2. Set the SERCOS node address before first power-up. The rotary address switches S1 and S2 on the drive’s front panel must be set to match the original drive’s SERCOS address. The drive does not auto-assign its address. Wrong address means the CNC cannot find the axis during ring initialization — you’ll get a SERCOS communication fault at the controller level, not at the drive, which makes diagnosis confusing.
3. Verify firmware revision compatibility. The FW suffix indicates standard firmware, but the specific firmware file (e.g., FWA-DIAX04-HDS-03VRS-MS) must be compatible with your IndraControl or third-party CNC version. Check the firmware revision on the drive’s front display at first power-up. Mismatched firmware causes SERCOS phase transition failures — the drive will not advance past phase 2.
4. Restore motor parameters via IDN P-0-4084. After SERCOS communication is established, download the saved parameter set. Critical parameters: motor type code, encoder type selection, peak current limit (IDN S-0-0092), maximum velocity (IDN S-0-0091), and position/velocity loop gains. Do not run the axis on default gains — the 100A rating means significant torque is available, and default gains on a large motor can cause instability.
5. Run motor identification (IDN P-0-0162) if motor data is unavailable. This routine auto-tunes the current controller for the connected motor. Mandatory if you are replacing both drive and motor simultaneously, or if the original parameter backup is lost.
6. Verify DC bus pre-charge on first power-up. The pre-charge relay in the HVR PSU should close within 2–3 seconds of mains application, and the DC bus should reach nominal voltage before the drive attempts to enable. A failed pre-charge resistor in the PSU will prevent the new drive from enabling — this is a PSU fault, not a drive fault.

Reliability in Harsh Conditions

The HDS03.2 platform was not designed for a temperature-controlled electrical room. It was designed for the machine tool floor — where coolant mist, metal dust, vibration, and thermal cycling are daily realities. Bosch Rexroth engineered the DIAX04 drive family to operate continuously in environments that would destroy standard industrial electronics within months.

The HT20 power section uses industrial-grade IGBT modules with junction temperature ratings that allow sustained 100A output even in cabinets with marginal ventilation. Thermal derating curves are conservative — the drive will reduce output current before tripping on overtemperature, giving the machine time to complete a controlled stop rather than a hard fault. The internal forced-air cooling system is rated for 40,000+ hours MTBF under continuous rated-load conditions.

Vibration and shock resistance is validated to IEC 60068-2-6 (sinusoidal vibration) and IEC 60068-2-64 (random vibration), covering the mechanical profiles of press lines, stamping machines, and transfer lines where floor-transmitted vibration is constant. The control board PCB carries conformal coating on all signal-level components, providing protection against condensation, humidity, and airborne contamination in foundry and coastal environments where relative humidity regularly exceeds 85%.

EMC compliance to EN 61800-3 Category C2 ensures the drive operates without injecting switching noise into the facility’s power infrastructure — critical in plants where servo drives share distribution panels with precision measurement equipment, vision systems, or sensitive process instrumentation. The internal EMC filter handles high-frequency IGBT switching transients before they reach the mains supply.

Every unit dispatched from our Xiamen facility undergoes physical inspection: connector integrity, label authenticity verification, and visual inspection of the power section and control board. ESD-sensitive assemblies are handled under anti-static protocols throughout the inspection and packing process. Units ship in double-wall corrugated cartons with foam-in-place cushioning engineered for the drop and compression forces of international air freight handling.

Global Express Logistics

Unplanned downtime does not accommodate sea freight schedules. Our Xiamen export operation is built around a single operational priority: your part leaves China on the same day you confirm the order.

Dispatch cutoff and timeline:

• Order confirmed before 14:00 CST: Same-day dispatch via DHL Express Worldwide or FedEx International Priority. Tracking number issued within 2 hours of carrier pickup.
• Order confirmed after 14:00 CST: Next business day dispatch. Pre-alert sent to your email and WhatsApp with estimated flight details.

Estimated transit times from Xiamen (XMN):

• Southeast Asia (SG, MY, TH, VN, ID): 2–3 business days — DHL Express
• Europe (DE, FR, IT, PL, CZ, NL): 3–5 business days — DHL Express / FedEx IP
• North America (US, CA, MX): 3–5 business days — FedEx International Priority
• Middle East (AE, SA, TR, IL): 3–4 business days — DHL Express
• South Asia (IN, PK, BD, LK): 3–4 business days — DHL Express
• Australia / New Zealand: 3–4 business days — DHL Express
• South America (BR, CL, CO): 5–7 business days — FedEx IP

Export documentation included as standard: Commercial invoice, packing list, certificate of origin. HS Code 8537.10 (servo drives / programmable controllers). Additional documentation — FORM E (ASEAN FTA), EUR.1 (EU preferential tariff), or destination-specific customs declarations — provided on request at no additional charge. All shipments are fully insured. If customs clearance issues arise at the destination, our export team provides documentation support within the same business day.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
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