Schneider VX4B600100 Control Block – ATV600 All Ratings

When This Control Block Is the Suspect

• InF0 / InF1 / InF2 / InF3 — relate to internal microprocessor communication interruption or power board rating / software incompatibility with the control block. Check ribbon seating and power-board model before replacing.
• InF6（Internal Error 6） — the drive fails to recognize an option module. Reseat the removable terminal cassette and any option card before concluding the control block is faulty.
• InFr（Internal Error 27） — CPLD signal acquisition anomaly on the control card, often linked to poor ribbon connection between the control block and power board after vibration. Reseat the ribbon and verify grounding/shielding.
• No display / fails to initialize — power is present, but the control block does not boot. Confirm the control-side supply rails before replacing the block.

Compatibility Check

• Drive series — confirm the drive is ATV630 / 650 / 660 / 680 / 6A0 / 6B0 / 6L0. This block is not for ATV610 or ATV900.
• Original block marking — confirm the existing control block reads VX4B600100.
• Fault context — confirm the active fault is an InF-series internal error or a CPU-level symptom. If the fault is terminal-level (e.g., NST, SPF), the relevant part is the I/O cassette, not this control block.
• If unsure, send a photo of the original control block label and the drive nameplate before purchase.

FAQ

Does InF0 or InFr always mean the VX4B600100 is faulty?

No. InF0 can indicate microprocessor communication interruption or invalid power-board rating. InFr often traces to ribbon seating or interference. Reseat connections and verify grounding before replacing the block.

Is VX4B600100 compatible with ATV610 or ATV900?

No. It is the ATV600 series control block. ATV610 uses a different control architecture, and ATV900 uses VX4B900100.

What does “All power ratings” mean for this block?

Schneider designates VX4B600100 as the control block for the entire ATV600 power range. However, InF2/InF3 faults involve power-board rating and software compatibility, so the power stage configuration must match the control block’s stored data.