Beckhoff KL3444, Documentation

Page: 48 / 58

Access from the User Program
KL3444, KL3448, KL3454 und KL3458 48 Version: 3.2.0
7.3.2 Register communication
Control byte 1 in register communication
Control byte 1 (CB1) is located in the output image [
}
43] , 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 …
CB1.0 Reg. no. Register number:
Enter here the number of the register that you wish
- to read with input data word
DataIN1 [ } 43] , or
- to write with output data word DataOUT1 [
}
43] .
Status byte 1 in register communication
The status byte 1 (SB1) is located in the input image [ } 43] 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 …
SB1.0 Reg. no. Number of the register that was read or written.