Lenze E84Dxxxx - Manual (Page 49)

Communication manual 8400 protec PROFIBUS
Parameter data transfer
DP-V1 parameter data channel (PROFIdrive profile)
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EDS84DPBUS EN 2.0 - 09/2010
8.3.3.1 Reading parameter data from the controller
Request head
Parameter attribute
Index and subindex
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Note!
• When a read request is processed, no parameter value is written to the slave.
• In case of a read request of multi parameters, parameter attribute, index, and
subindex are repeated with the number "n" of the requested parameters.
• A read request must not exceed the maximum data length of 240 bytes.
Byte 1 Byte 2 Byte 3 Byte 4
Request reference Request identification Axis Number of indices
Field Data type Values
Request reference U8 This value is specified by the master
Request identification U8 0x01: Request parameters for reading
Axis U8 0x00 or 0x01
Number of indices U8 0x"n" (n = number of parameters requested)
Byte 5 Byte 6
Attribute Number of subindices
Field Data type Values
Attribute U8 0x10: Value
Number of subindices U8 0x00
(For array elements: Enter the number of array elements
required.)
Byte 7 Byte 8 Byte 9 Byte 10
Index Subindex
High byte Low byte High byte Low byte
Field Data type Values
Index U16 0x0001 ... 0xFFFF (1 ... 65535)
Subindex U16 0x0001 ... 0xFFFF (1 ... 65535)