326 Fieldbus control with embedded fieldbus
Note: Parameter writes through standard Modbus are always volatile, ie, modified
values are not automatically stored to the permanent memory. Use parameter 1607
PARAM SAVE to save all changed values.
Function codes
Supported function codes for the holding 4xxxx register:
Note: In the Modbus data message, register 4xxxx is addressed as xxxx -1. For
example, register 40002 is addressed as 0001.
40034 ACS355 Status
word MSW
R 0304 FB STS WORD 2, ie, the most significant word of
the DCU profile 32-bit Status word.
Supported only by the DCU profile, ie, when 5305 EFB
CTRL PROFILE setting is DCU PROFILE.
Code
hex
(dec)
Function name Additional information
03
(03)
Read 4X Register Reads the binary contents of registers (4X references) in a slave
device.
06
(06)
Preset single 4X
register
Presets a value into a single register (4X reference). When
broadcast, the function presets the same register reference in all
attached slaves.
10
(16)
Preset multiple
4X registers
Presets values into a sequence of registers (4X references). When
broadcast, the function presets the same register references in all
attached slaves.
17
(23)
Read/Write 4X
registers
Performs a combination of one read operation and one write
operation (function codes 03 and 10) in a single Modbus
transaction. Write operation is performed before the read
operation.
Modbus register Access Information
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