Function Codes; Exception Codes - ABB ACS355 User Manual

314 Fieldbus control with embedded fieldbus

Function codes

Supported function codes for the holding 4xxxx register:
Code Function name
hex
(dec)
03 Read 4X Register Reads the binary contents of registers (4X references) in a slave
(03)
06 Preset single 4X
(06) register
10 Preset multiple 4X
(16) registers
17 Read/Write 4X
(23) registers
Note: In the Modbus data message, register 4xxxx is addressed as xxxx -1. For
example register 40002 is addressed as 0001.

Exception codes

Exception codes are serial communication responses from the drive. The drive
supports the standard Modbus exception codes listed in the following table.
Code Name
01 Illegal Function
02 Illegal Data Address Address does not exist or is read/write protected.
03 Illegal Data Value
Drive parameter 5318 EFB PAR 18
Additional information
device.
Presets a value into a single register (4X reference). When
broadcast, the function presets the same register reference in all
attached slaves.
Presets values into a sequence of registers (4X references). When
broadcast, the function presets the same register references in all
attached slaves.
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.
Description
Unsupported command
Incorrect value for the drive:
• Value is outside minimum or maximum limits.
• Parameter is read-only.
• Message is too long.
• Parameter write is not allowed when start is active.
• Parameter write is not allowed when factory macro is
selected.
holds the most recent exception code.