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Parameter data transfer

PROFIdrive parameter data channel

PROFIdrive DP−V1

100

EDSMF2133IB EN 5.0

8.3.1.4 Reading parameters

) Note!

ƒ When a read request is processed, no parameter value is written to the

slave.

ƒ A response to a read request does not contain the parameter attribute,

index and subindex.

ƒ When a multi−parameter read request is transferred, the parameter

attribute, index and subindex are repeated according to the number "n" of

the parameters requested.

ƒ A read request must not exceed the maximum data length of 240 bytes.

Request header

Byte 1 Byte 2 Byte 3 Byte 4

Request reference

Request identification

Axis

Number of indexes

Request reference: This value is specified by the master

Request identification: 0x01 (request parameter for reading)

Axis: 0x00 or 0x01

Number of indexes: 0x"n" (number of parameters requested)

Parameter attribute

Byte 5 Byte 6

Attribute

Number of

subindexes

Attribute: 0x10 (value)

Number of subindexes: 0x00

l For array parameters enter the number of array parameters requested.

Index and subindex

Byte 7 Byte 8 Byte 9 Byte 10

U16

Index

U16

Subindex

Index: 0x0001 ... 0xFFFF (1 ... 65535)

Subindex: 0x0001 ... 0xFFFF (1 ... 65535)

l 0x0000 for all non−array parameters

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 133 134

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