ABB ACQ580 Firmware Manual page 374

Pump control program

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370 Fieldbus control through the embedded fieldbus interface (EFB)

Modern Modbus master devices typically provide a means to access the full range of

65536 Modbus holding registers. One of these methods is to use 6-digit decimal

addresses from 400001 to 465536. This manual uses 6-digit decimal addressing to

represent Modbus holding register addresses.

Modbus master devices that are limited to the 5-digit decimal addressing may still

access registers 400001 to 409999 by using 5-digit decimal addresses 40001 to

49999. Registers 410000-465536 are inaccessible to these masters.

See parameter

58.33 Addressing

Note: Register addresses of 32-bit parameters cannot be accessed by using 5-digit