Control And Status Byte - Beckhoff KL6224 Documentation

Access from the user program
5.2

Control and status byte

Register communication
Control byte (for register communication)
The control byte (CB) is located in the output image [} 34], and is transmitted from the controller to the
terminal.
Bit CB.7 CB.6
Name RegAccess R/W
Key
Bit Name
CB.7 RegAccess
CB.6 R/W
CB.5 to CB.0 Reg. no.
Status byte (for register communication)
The status byte (SB) is located in the input image [} 34], and is transmitted from terminal to the controller.
Bit SB.7 SB.6
Name RegAccess R/W
Key
Bit Name
SB.7 RegAccess
SB.6 R
SB.5 to SB.0 Reg. no.
Process data mode
Control and status byte in process data mode
In process data mode the control and status bytes of the KL6224 currently have no addi-
tional function.
Note
Control byte in process data mode
The control byte (CB) is located in the output image [} 34], and is transmitted from the controller to the
terminal.
Bit CB.7
Name RegAccess -
Key
Bit Name
CB.7 RegAccess
CB.6 to CB.0 -
38
CB.5 CB.4
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 [} 39] that you want to read or write
here.
SB.5 SB.4
Reg. no.
Description
1 Acknowledgement for register access
bin
0 Read access
bin
Number of the register that was read or written.
CB.6 CB.5
-
Description
0 Register communication off (process data mode)
bin
0 reserved
bin
Version: 2.0.0
CB.3 CB.2
SB.3 SB.2
CB.4 CB.3
- -
CB.1 CB.0
SB.1 SB.0
CB.2 CB.1
- -
CB.0
-
KL6224