Lenze E94AYCPM - Manual (Page 49)

Lenze · E94AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 12.0 EN · 11/2012 · TD17
49
9 Parameter data transfer
9.2 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 reading 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 ( 50)
010 Write request (write data to the controller)
Writing parameter data to the controller ( 50)
100 Data transfer abort by the master
Data transfer abort by the master ( 51)
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.
Bytes 5 ... 8 contain a parameter value (Data 1 ... 4 ).
1 Request not completed because of an error.
• The set status bit indicates that the telegram is an "error telegram".
• Bytes 5 ... 8 contain an error code (Error 1 ... 4 ).
Error codes ( 54)