GE Industrial Solutions AF-600 FP Profibus DP - Manual (Page 46)

5.2.9 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 Identification for read or write request
0x02 change parameter value
0x42 change parameter non-volatile
0x51 request par. value double word
0x52 change par. value double word
Response ID Unsigned8 0x01 request parameter (+) Positive Identification for the response
0x02 change parameter (+) Positive
0x81 request parameter (-) Negative
0x82 change parameter (-) Negative
Axis Unsigned8 0x00..0xFF number (always 0)
Number of parameters Unsigned8 0x01..0x25 Limitation: DP V1 message length
Attribute Unsigned8 0x10 value
0x20 description Data description
0x30 text
Number of elements Unsigned8 Limitation: DP V1 message length
0x01-0xFA Quantity 1-234
Parameter number Unsigned16 0x0001... number 1-65535 Parameter number
0xFFFF
Subindex Unsigned16 0x0000 number 0-65535 Array pointer
0xFFFF
Format Unsigned8 See table
Number of values Unsigned8 0x01..0xEA Quantity 0-234 Limitation: DP V1 message length
Error number Unsigned16 0x0000... Error number
5.2.10 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.
5.2.11 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)
5.2.12 Response ID
The Response ID indicates if the Read or Write request was successfully performed in the frequency converter. 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.
5.2.13 Axis
The axis attribute should be set to zero.
AF-650 GP/AF-600 FP Profibus DP Operating Instructions
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