Control and status byte
Register communication
Control byte (for register communication)
The control byte (CB) is located in the output image, 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 | 1bin | Register communication switched on |
CB.6 | R/W | 0bin | Read access |
1bin | Write access | ||
CB.5 to CB.0 | Reg. no. | Register number: |
Status byte (for register communication)
The status byte (SB) is located in the input image, and is transmitted from 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. |
Key
Bit | Name | Description | |
---|---|---|---|
SB.7 | RegAccess | 1bin | Acknowledgement for register access |
SB.6 | R | 0bin | Read access |
SB.5 to SB.0 | Reg. no. | Number of the register that was read or written. |
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 additional function. |
Control byte in process data mode
The control byte (CB) is located in the output image, 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 | - | - | - | - | - | - | - |
Key
Bit | Name | Description | |
---|---|---|---|
CB.7 | RegAccess | 0bin | Register communication off (process data mode) |
CB.6 to CB.0 | - | 0bin | reserved |
Status byte in process data mode
The status byte (SB) is located in the input image, and is transmitted from terminal to the controller.
Bit | SB.7 | SB.6 | SB.5 | SB.4 | SB.3 | SB.2 | SB.1 | SB.0 |
Name | RegAccess | - | - | - | - | - | - | - |
Key
Bit | Name | Description | |
---|---|---|---|
SB.7 | RegAccess | 0bin | Acknowledgement for process data mode |
SB.6 to SB.0 | Error | 0bin | reserved |