Lenze E84DxxxxxxxxxR - Manual (Page 40)

Communication manual 8400 protec PROFINET
Parameter data transfer
Reading parameters from the controller
40
L
EDS84DPNET EN 4.0 - 11/2010
8.2 Reading parameters from the controller
Request header
Parameter attribute
Index and subindex

Note!
• When a read request is processed, no parameter value is written to the IO
device.
• In the case of a multi-parameter read request, the parameter attribute, index,
and subindex are repeated "n" times, "n" being the number of parameters
requested.
Byte 1 Byte 2 Byte 3 Byte 4
Request reference Job identification Axis Number of indices
Field Data type Values
Request reference U8 This value is specified by the IO controller.
Job identification U8 0x01: Request parameter 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 or 0x01
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)