Beckhoff KL5001 User Manual download pdf (Page 12)

12 KL5001

Terminal´s

64 words

Control-/

status byte

User data

K-Bus

If control bit 7=0: input/output

If control bit 7=1:

configuration

C/S-bit 7

If control bit 7=1:

adress in the control bit 0-5

If control bit 6=0: read

If control bit 6=1: write

Complex bus terminal

To the bus coupler

2 or mors bytes

The control or status byte occupies the lowest address of a logical channel.

The corresponding register values are located in the following 2 data bytes

(the BK2000 is an exception to the rule: here, an unused data byte is in-

serted after the control or status byte, thus setting the register value to a

word limit).

Example

Reading register 8 in the BK2000 with a Kl3022 and the end terminal.

If the following bytes are transferred from the controller to the terminal,

Byte0

Control

Byte1

Not used

Byte2

Data OUT, high byte

Byte3

Data OUT, low byte

0x88 0xXX 0xXX 0xXX

the terminal returns the following type designation (0x0BCE corresponds to

the unsigned integer 3022).

Byte0

Status

Byte1

Not used

Byte2

Data IN, high byte

Byte3

Data IN, low byte

0x88 0x00 0x0B 0xCE

A further example

Writing register 31 in the BK2000 with an intelligent terminal and the end

terminal.

If the following bytes (user code word) are transferred from the controller to

the terminal,

Byte0

Control

Byte1

Not used

Byte2

Data OUT, high byte

Byte3

Data OUT, low byte

0xDF 0xXX 0x12 0x35

the user code word is set and the terminal returns the register address with

the bit 7 for register access and the acknowledgement.

Byte0

Status

Byte1

Not used

Byte2

Data IN, high byte

Byte3

Data IN, low byte

0x9F 0x00 0x00 0x00

1 2 ... 7 8 9 10 11 12 13 14 15 16

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Beckhoff KL5001 User Manual Page 12

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