Beckhoff KL4494, Manual

Page: 30 / 40

Access from the user program
KL4494 30 Version: 2.0.0
Register communication
Control byte 1 (CB1) in register communication
Control byte 1 is located in the output image [
}
29] , 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 that you
• want to read with input data word DataIN1 [ } 29] or
• with the output data word DataOUT1 [ } 29]
Status byte 1 (SB1) in register communication
The status byte 1 is located in the input image [
}
29] 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.