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FC 300 Profibus
How to Access FC 300 Parameters
Request / Response Attributes
The table contains an overview of the possible attributes of the PROFIdrive parameter channel.
Field
Data type
Values
Remark
Request reference
Unsigned8
0x01..0xFF
Request ID
Unsigned8
0x01
request parameter value
0x02
change parameter value
0x42
change parameter non-volatile
0x51
request par. value double word
0x52
change par. value double word
Identification for read or write
request
Response ID
Unsigned8
0x01
request parameter (+)
0x02
change parameter (+)
0x81
request parameter (-)
0x82
change parameter (-)
Identification for the response
Axis
Unsigned8
0x00..0xFF
number (always 0)
Number of
parameters
Unsigned8
0x01..0x25
Limitation: DP V1 telegram
length
Attribute
Unsigned8
0x10
value
0x20
description
0x30
text
Number of
elements
Unsigned8
0x01-0xFA
Quantity 1-234
Limitation: DP V1 telegram
length
Parameter number
Unsigned16
0x0001...
number 1-65535
0xFFFF
Subindex
Unsigned16
0x0000
number 0-65535
0xFFFF
Format
Unsigned8
0x01..0x36
Data types
0x40
Null
0x41
Byte
0x42
Word
0x43
Double word
0x44
Error
Number of values
Unsigned8
0x01..0xEA
Quantity 0-234
Limitation: DP V1 telegram
length
Error number
Unsigned16
0x0000...
Error number
Request Reference
Unique identification of request/response pair for the master. The master changes the request reference with
each new request. The slave mirrors the request reference in the response.
Request ID
The following request identifications are defined:
0x01
Request parameter
0x02
Change parameter (Data are NOT stored in non-volatile memory, lost at power
cycle)
0x42
Change parameter non-volatile (Data are stored in non-volatile memory)
0x51
Request parameter value double word. (All parameters are formatted and
transferred as Double Word size, regardless of the actual data type)
0x52
Change parameter value double word. (All parameters must be formatted and sent
as Double Word size, regardless of data type)
Response ID
The Response ID indicates if the Read or Write request was successfully performed in the FC 300. If the
response is negative, the request is answered negative (first bit = 1) and an error code is entered per
partial response, instead of the value.
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