Exception Codes; Data Update - ABB RMBA-01 User Manual

Exception codes

Code
01
02
03

Data update

RMBA-01 User's manual
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The RMBA-01 supports the Modbus exception codes
shown in Table
Table 5-2 Exception codes.
Name
ILLEGAL FUNCTION
ILLEGAL DATA ADDRESS Address does not exist or is
ILLEGAL DATA VALUE
The RMBA-01 module has been designed for time-
optimised, reliable data transfer between the Modbus
network and the drive.
Table 5-3 Function codes.
Code Name
03 Read holding
registers
06 Preset single
register
16 Preset multiple
(10 hex) registers
Data set registers are updated in a cyclic interval.
Updating of parameter registers happens at a slower
interval.
Chapter 5 – Communication
5-2.
Reason
Unsupported command.
read/write protected.
Value is outside min-max
limits. Parameter is read-only.
Meaning
Reads the binary contents of
holding registers
(4X references) in the slave.
Presets a value into a single
holding register (4X reference).
When broadcast, the function
presets the same register
reference in all attached slaves.
Presets values into a sequence
of holding registers
(4X references). When
broadcast, the function presets
the same register references in
all attached slaves.
5-3