Beckhoff KL6021-0023, Документация, Страница: 25 / 34

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