ABB Protronic 100 Manual page 16

Description of the acyclic WRITE service in accordance with DP V1
The acyclic write service always derives the slot and index from
the hexadecimal 16-bit variable index for reading. - Four
parameters are handed over in the request telegram:
Request telegram:
Parameter Value range
name
Slot 0 - 254
Index 0 - 254
Length 1 - 240
Data ......
Table 4
Positive response telegram:
Parameter Value range
name
Length 1 - 240
Table 5
16 Operation
Data type Description
Byte Slot for addressing the
variable to write.
Byte Index for addressing the
variable to write.
Byte Number of bytes to write-
Bytes Bytes for value of variable to
write. It is impossible to
specify more bytes than
defined by length.-
Data type Description
Byte Number of written bytes. If
the required length for the
data is inferior than the
requested length, the
negative value is entered
here. If the required length for
the data is superior to the
requested length, the
requested length is entered
here. --
Negative response telegram:
Parameter Value range
name
Error ......
ID
Error code 1 ......
Error code 2 ......
Table 6
Data type Description
Byte Provides information about
the sending protocol system
(here PROFIBUS-DP V1).-
The only valid value that may
appear here is 128.-
Byte Error details. ID: -
0xA1 Variable defined by
slot and index is
unknown.-
0xA8 Controller firmware
does not support
PROFIBUS-DP
V1.-
0xB0 Service not yet
usable.-
0xC0 Too many requests
at the same time.
Current request will
not be processed. -
-
Byte Not used