EDS84DMOTPBUS EN 3.0 - 11/2011 L 57
Communication manual 8400 motec PROFIBUS
Parameter data transfer
PROFIdrive parameter data channel (DP-V1)
Parameter value
9.3.3.3 Response to a read error
Response header
Byte 7 Byte 8 Byte 9 Byte 10
Value
Field Data type Values
Value String Any (length > 4 bytes possible)
U8 0x00 .... 0xFF
U16 0x0000 .... 0xFFFF
U32 0x0000 0000 .... 0xFFFF FFFF
Note!
In the case of a multi-parameter request, correct and possible faulty messages
are summarised in one telegram. They have the following data contents:
• Correct message:
– Format: data type of the value requested
– Number of values: as described in chapter "Reading parameter data from
the controller" ( 55).
– Parameter value: value requested
• Faulty message
– Format: 0x44
– Number of values: 0x01 or 0x02
– Error code without additional information (for number of values = 0x01) or
– Error code with additional information (for number of values = 0x02)
A faulty access to a parameter "n" is indicated at the nth position in the response
telegram of a multi-parameter request.
Byte 1 Byte 2 Byte 3 Byte 4
Request reference
(mirrored)
Response identification Axis
(mirrored)
Number of indices
Field Data type Values
Request reference U8 Mirrored value of the parameter request
Response identification U8 0x81: Parameter has not been read
• The data in the bytes 7 + 8 must be interpreted as an
error code.
Axis U8 0x00 or 0x01
Number of indices U8 0x"n" (n = number of parameters requested)
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