Beckhoff KL3222, Documentation

Page: 34 / 43

Access from the user program
KL3222 34 Version: 2.3.0
5.2.2 Register communication
Control byte 1 (in register communication)
Control byte 1 (CB1) is located in the output image, and is transmitted from the controller to the terminal.
Bit CB1.7 CB1.6 CB1.5 CB1.4 CB1.3 CB1.2 CB1.1 CB1.0
Name RegAccess R/W Reg. no.
Key
Bit Name Description
CB1.7 RegAccess 1
bin
Register communication switched on
CB1.6 R/W 0
bin
Read access
1
bin
Write access
CB1.5 to
CB1.0 Reg. no. Register number:
Enter the number of the
register [
}
35] that you
- want to read with input data word DataIn [
}
32] or
- want to write with output data word DataOut [
}
32] .
Status byte 1 (in register communication)
The status byte 1 (SB1) is located in the input image and is transmitted from terminal to the controller.
Bit SB1.7 SB1.6 SB1.5 SB1.4 SB1.3 SB1.2 SB1.1 SB1.0
Name RegAccess R/W Reg. no.
Key
Bit Name Description
SB1.7 RegAccess 1
bin
Acknowledgment for register access
SB1.6 R 0
bin
Read access
SB1.5 to
SB1.0 Reg. no. Number of the register that was read or written.