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Canopen communication – Lenze I/O system 1000 System Manual User Manual

Page 281

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CANopen communication

Transmitting parameter data

Reading a parameter (example)

8

l

281

EDSIO1000 EN 7.0

Telegram from the I/O system (value of the requested parameter)

Formula

Information

Identifier

= Basic identifier + node address
= 1408 + 2 = 1410

l

Basic identifier for parameter channel 1 (input) = 1408

l

Node address of the I/O system = 2

Instruction code = 43

h

l

Read Response command (response to the read request
with the current value)

Index

= Index of the read request

Subindex

= Subindex of the read request

Data 1
Data 2
Data 3
Data 4
Data 1 ... 4

= 00

h

= 00

h

= 05

h

= 3B

h

= 00 00 05 3B

h

l

Assumption: The first channel of the first analog
module outputs a voltage signal 0 ... +10 V with a
resolution of 0 ... 07648

dec

.

11 bits

Eight bytes of user data

Identifier

Instructio

n code

Index

Subindex

Data 1

Data 2

Data 3

Data 4

LOW byte HIGH byte

1410

43

h

00

h

31

h

0

00

h

00

h

05

h

3Bh