DP-V1 communication
83
Table 18. PROFIdrive Request header
Field(s) Description Range
Byte/
Word
Request
Reference
Unique identification set by the master.
Changed for each new request.
1 … 255 Byte
Request ID Request type for the issued block. Request
Parameter (01h)
Change
Parameter (02h)
Byte
Axis To be set to 0 or 1. 0 … 255 Byte
No. of
Parameters
Number of parameters that are present
in the request.
1…37 Byte
Attribute Type of object being accessed.
Note: “Text” is not supported.
Value (10h)
Description (20h)
Text (30h)
Byte
No. of
Elements
Number of array elements accessed or
length of string accessed. Set to 0 if
non-array parameters are used.
0, 1 … 234 Byte
Parameter
Index
Address of the parameter that is being
accessed. “0” is allowed by RPBA-01.
1 … 65535 Word
Subindex Addresses the first array element of the
parameter or the beginning of a string
access or the text array, or the
description element that is being
accessed.
0 … 65535 Word
Format* See Table 20. See Table 20 Byte
Number of
Values*
Number of values following. 0 … 234 Byte
Values* The values of the request. In case of
odd number of bytes, a zero byte is
appended to ensure the word structure
of the telegram.
– See
Format
field
*Only if Request ID is 02h (Change Parameter). The Format, Number of Values
and Values fields are repeated for other parameters.
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