Technical data

Manual – MOVI-PLC® advanced DH.41B Controller

Structure of the DP-V1 parameter channel

PROFIBUS-DP-V1 Functions

Example for read-

ing a parameter via

MOVILINK

The following tables give an example of the structure of the Write.request and Read.req

user data for reading an individual parameter via the MOVILINK

parameter channel.

Sending parameter request

The following table displays the code of the user data for the Write.req service specifying

the DP-V1 header.

The Write.req service is used to transfer the parameter setting request to the

MOVI-PLC

advanced DHF41B control card. The firmware version is read.

Query parameter response

The following table shows the code of the Read.req user data including the DP-V1

header.

Service Write.request

Slot_Number 0 Random, (is not evaluated)

Index 47 Index of the dataset; constant index 47

Length 10 10 byte user data for parameter request

Byte Field Value Description

0 Request reference 0x01 Individual reference number for the parameter

setting order is reflected in the parameter

response

1 Request ID 0x40 SEW MOVILINK

service

2 Axis 0x00 Axis number; 0 = Single axis

3 No. of parameters 0x01 1 parameter

4 Attributes 0x10 MOVILINK

service "Read parameter"

5 No. of elements 0x00 0 = access to direct value, no subelement

6..7 Parameter Number 0x206C MOVILINK

index 8300 = "Firmware version"

8..9 Subindex 0x0000 Subindex 0

Service Read.request

Slot_Number 0 Random, (is not evaluated)

Index 47 Index of the dataset; constant index 47

Length 240 Maximum length of response buffer in the DP-V1 master