4 transmitting parameter data, 1 telegram structure, Transmitting parameter data – Lenze EPM−T9XX Modular system User Manual

Page 231: Telegram structure, Network via canopen, Transmitting parameter data telegram structure

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Transmitting parameter data

Telegram structure

9

Network via CANopen

9.4

9.4.1

L

9.4−1

EDSPM−TXXX−9.0−11/2009

9.4

Transmitting parameter data

Parameter data are the so−called indices.

Parameters are usually set only once during commissioning.

Parameter data are transmitted as so−called SDOs (Service Data Objects) via the
system bus and acknowledged by the receiver, i.e. the transmitter gets a feedback
if the transmission was successful.

9.4.1

Telegram structure

Structure of the telegram for parameter data:

11 bit

8 bytes of user data

Identifier

Instruction

code

Index

Subindex

Data 1

Data 2

Data 3

Data 4

Low byte High byte

l

The subchapters below explain the individual telegram components in detail.

l

The chapter 9.4.2 contains an example of how to write a parameter.

(

9.4−4)

l

The chapter 9.4.3 contains an example of how to read a parameter.

(

9.4−5)

Identifier

Instruction

code

Index

Subindex

Data 1

Data 2

Data 3

Data 4

Low byte High byte

One parameter channel is available for parameter data transmission, which is
addressed via the identifier.

Identifier =

Basic identifier

+ node address of the device

dec

hex

SDO

Parameter channel 1

Output (transmit)

1408

580

+ value set with coding switch

Input (receive)

1536

600

Identifier

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