2 byte 1: service, Byte 1: service, Communication manual 8400 motec profibus – Lenze E84DGFCP User Manual
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EDS84DMOTPBUS EN 3.0 - 11/2011
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Communication manual 8400 motec PROFIBUS
Parameter data transfer
DRIVECOM parameter data channel (DP-V0)
9.2.2
Byte 1: Service
Request and response control for the parameter data channel
[9-1]
Method of counting for bits 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 ( 44)
010 Write request (write data to the controller)
Reading parameter data from the controller ( 44)
100 Data transfer abort by the master
Data transfer abort by the master ( 45)
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 state 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 status 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 status bit set indicates that the telegram is an "error telegram". The data of bytes 5 ... 8 (data/
error) must be interpreted as an error message.