ABB ACH550-VCR - Page 249

ACH550-UH User’s Manual 1-245
Embedded fieldbus
For the Modbus protocol, drive parameters in group 53 report the parameter
mapping to 4xxxx Registers.
Except where restricted by the drive, all parameters are available for both reading
and writing. The parameter writes are verified for the correct value, and for a valid
register addresses.
Note: Parameter writes through standard Modbus are always volatile i.e. modified
values are not automatically stored to permanent memory. Use parameter 1607
PARAM. SAVE to save all altered values.
The ACH550 supports the following Modbus function codes for 4xxxx registers:
40047 ACH550 REF2 LSW R/W Maps directly to the Least Significant Word of the DCU
profile’s
REF2. Supported only if BP Parameter
5305 = 1. See drive parameter 0112.
40048 ACH550
REF2 MSW R/W Maps directly to the Most Significant Word of the DCU
profile’s
REF2. Supported only if BP Parameter
5305 = 1. See drive parameter 0112.
Code Description
5310 EFB PAR 10
Specifies the parameter mapped to Modbus register 40005.
5311 EFB PAR 11
Specifies the parameter mapped to Modbus register 40006.
5312 EFB PAR 12
Specifies the parameter mapped to Modbus register 40007.
5313 EFB PAR 13
Specifies the parameter mapped to Modbus register 40008.
5314 EFB PAR 14
Specifies the parameter mapped to Modbus register 40009.
5315 EFB PAR 15
Specifies the parameter mapped to Modbus register 40010.
5316 EFB PAR 16
Specifies the parameter mapped to Modbus register 40011.
5317 EFB PAR 17
Specifies the parameter mapped to Modbus register 40012.
5318 Reserved.
5319 EFB PAR 19
Holds a copy (in hex) of the
CONTROL WORD, Modbus register 40001.
5320 EFB PAR 20
Holds a copy (in hex) of the
STATUS WORD, Modbus register 40004.
Function Code Description
03 Read holding 4xxxx registers
06 Preset single 4xxxx register
16 (0x10 Hex) Preset multiple 4xxxx registers
23 (0x17 Hex) Read/write 4xxxx registers
Modbus Register Access Remarks