Lenze E84Dxxxx - Manual (Page 37)

Communication manual 8400 protec PROFIBUS
Parameter data transfer
DP-V0 parameter data channel (DRIVECOM profile)
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EDS84DPBUS EN 2.0 - 09/2010
8.2.2 Byte 1: Service
Request and response control for the parameter data channel
[8-1] Method of counting for bit 0 ... 7
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Service Subindex Index
High byte
Index
Low byte
Data 4 /
Error 4
Data 3 /
Error 3
Data 2 /
Error 2
Data 1 /
Error 1
7 6 5 4 3 2 1 0
Bit 0 ... 2: Request
Read/write request from the master to the controller
000 No request
001 Read request
 Reading parameter data from the controller ( 38)
010 Write request (write data to the controller)
 Writing parameter data to the controller ( 38)
100 Data transfer abort by the master
 Data transfer abort by the master ( 39)
Bit 3
Reserved
Bit 4/5: Data length
Data length ≤ 4 bytes in the telegram bytes 5 ... 8 (data 1 ... 4 / error 1 ... 4)
00 1 byte
01 2 bytes
10 3 bytes
11 4 bytes
Bit 6: Handshake
Indicates a new request.
• The status of this (toggle) bit is changed by the master for every new request.
• The controller copies the bit into its response telegram.
Bit 7: Status
Status information from the controller to the master when sending the request confirmation.
• This bit informs the master whether the request has been carried out without errors.
0 Request completed without errors.
1 Request not completed because of an error.
• The set status bit indicates that the telegram is an "error telegram". The data of bytes 5 ... 8 (data/
error) has to be interpreted as an error message.
 Error codes ( 42)