Lenze E94AYCPM Manual de usuario descargar pdf (Pagina 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)

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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

76543210

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)

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 124 125

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Lenze E94AYCPM Manual de usuario Pagina 49

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