Control and status bytes
Channel 1: The control and status bytes for channel 1 are illustrated in the following.
Channel 2: The control and status bytes of channel 2 have the same structure as the control and status bytes of channel 1.
Process data mode
Control byte 1 (CB1) in process data mode
Control byte 1 is located in the output image, and is transmitted from the controller to the terminal. In process data mode it has no function.
Bit | CB1.7 | CB1.6 | CB1.5 | CB1.4 | CB1.3 | CB1.2 | CB1.1 | CB1.0 |
Name | RegAccess | - | - | - | - | - | - | - |
Key
Bit | Name | Description | |
|---|---|---|---|
CB1.7 | RegAccess | 0bin | Register communication off (process data mode) |
CB1.6 - CB1.0 | - | 0bin | reserved |
Status byte 1 (SB1) in process data mode
The status byte 1 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 | Error | LimitValue 2 State | LimitValue 1 State | Overrange | Underrange | ||
Key
Bit | Name | Description | |
|---|---|---|---|
SB1.7 | RegAccess | 0bin | Acknowledgment for process data mode |
SB1.6 | Error | 1bin | General error bit |
SB1.5 - SB1.4 | LimitValue 2 | 00bin | Limit value 2 not activated |
01bin | Process data less than limit value 2 | ||
10bin | Process data greater than limit value 2 | ||
11bin | Process data equal limit value 2 | ||
SB1.3 - SB1.2 | LimitValue 1 | 00bin | Limit value 1 not activated |
01bin | Process data less than limit value 1 | ||
10bin | Process data greater than limit value 1 | ||
11bin | Process data equal limit value 1 | ||
SB1.1 | Overrange | 1bin | Permissible measuring range exceeded |
SB1.0 | Underrange | 1bin | Lower measuring range limit violated |
Register communication
Control byte 1 (CB1) in register communication
Control byte 1 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 (SB1) in register communication
The status byte 1 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 | Acknowledgment 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. | |