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 |
1bin |
Register communication switched on |
CB1.6 |
R/W |
0bin |
Read access |
1bin |
Write access | ||
CB1.5 to CB1.0 |
Reg. no. |
Register number: |
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 |
1bin |
Acknowledgement for register access |
SB1.6 |
R |
0bin |
Read access |
SB1.5 to SB1.0 |
Reg. no. |
Number of the register that was read or written. |