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Yaskawa Modbus register maps

Updated 24 October 2026

3 Yaskawa models, 177 registers in all, each re-typed from Yaskawa’s own free documentation and checked against it.

• Variable frequency drive

  Yaskawa A1000 AC drive (MEMOBUS/Modbus RTU)

  Yaskawa A1000 drives (CIMR-AU; 200 V, 400 V and 600 V classes) using the built-in RS-422/485 MEMOBUS/Modbus terminals (TB5), per Technical Manual SIEP C710616 41H.

  66 registers · 13 writable · RTU
  Also known as: CIMR-AU, CIMR-AUA, A1000 High Performance Vector Control Drive
• Variable frequency drive

  Yaskawa GA500 AC drive (MEMOBUS/Modbus RTU)

  Yaskawa GA500 drives using the built-in RS-485 MEMOBUS/Modbus port (terminal TB4), per technical reference SIEPC71061752 revision C.

  48 registers · 21 writable · RTU
  Also known as: CIPR-GA50U, GA500 Versatile Compact
• Variable frequency drive

  Yaskawa V1000 AC drive (MEMOBUS/Modbus RTU)

  Yaskawa V1000 drives (CIMR-VU; 200 V single/three-phase and 400 V three-phase, 0.1-18.5 kW) using the built-in RS-422/485 MEMOBUS/Modbus terminals, per Technical Manual SIEP C710606 18F.

  63 registers · 11 writable · RTU
  Also known as: CIMR-VU, V1000 Compact Vector Control Drive

Yaskawa: default communication settings

Factory defaults as the manufacturer documents them. Change one setting at a time on site and write down what you changed. Word order applies to 32-bit values; the addressing column says how the manufacturer prints register numbers (every map on this site also gives the 0-based wire address).