Access From The User Program; Process Image; Control And Status Byte - Beckhoff KL6021-0023 Documentation

6

Access from the user program

6.1

Process image

The KL6021-0023 is represented in the process image with 12 bytes of input data and 12 bytes of output
data. These are organized as follows:
Byte offset Format
0 Byte
1 Byte
2 Byte
3 Byte
4 Byte
5 Byte
6 Byte
7 Byte
8 Byte
9 Byte
10 Byte
11 Byte
6.2

Control and status byte

Register communication
Control byte (for register communication)
The control byte (CB) is located in the output image [} 25], and is transmitted from the controller to the
terminal.
Bit CB.7
Name RegAccess
Key
Bit Name
CB.7 RegAccess
CB.6 R/W
CB.5 to Reg. no.
CB.0
Status byte (for register communication)
The status byte (SB) is located in the input image [} 25], and is transmitted from the terminal to the
controller.
Bit SB.7
Name RegAccess
KL6021-0023 and KL6023
CB.6 CB.5 CB.4
R/W Reg. no.
Description
1 Register communication switched on
bin
0 Read access
bin
1 Write access
bin
Register number:
Enter the number of the register [} 27] that you want to read or write here.
SB.6 SB.5 SB.4
R/W Reg. no.
Version: 2.0.0
Access from the user program
Input data
Status byte (SB [} 25])
DataIn0
DataIn1
DataIn2
DataIn3
DataIn4
DataIn5
DataIn6
DataIn7
DataIn8
DataIn9
DataIn10
CB.3 CB.2
SB.3 SB.2
Output data
Control byte (CB [} 25])
DataOut0
DataOut1
DataOut2
DataOut3
DataOut4
DataOut5
DataOut6
DataOut7
DataOut8
DataOut9
DataOut10
CB.1 CB.0
SB.1 SB.0
25