Digital guide
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Detailed content
Specifications:
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Module: VFS5 platform
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Current: 255 A rating class (label code 255)
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Bus: ~325 VDC typical (internal PSU generates ±18 V, +10 V, +5 V logic)
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Feedback: Resolver 8.5 kHz excitation, R/D converter AD2S82
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Control: Microcontroller N80C196KB, EPROM firmware, SRAM parameter store
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Alarms: Numeric fault codes (17 feedback loss, 18 bad TL, 84 out of bounds)
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Interface: MotionLink+ serial service port
Features: Onboard resolver-to-digital, no external R/D box needed.
Applications: CNC machining center spindles, retrofit milling machines.
Working Principle: DC bus chopper → 3-phase IGBT output → resolver demodulation → velocity/position loop in firmware.
Installation: 19-inch rack/cabinet, forced cooling recommended, isolate resolver shield.
Precautions: Protected variables (VOLTS, ROTARY) must not be edited blindly; wrong SRAM values cause 18/27 alarms. Re-zero resolver after replacement using MotionLink+.
