Control and status bytes
Process data mode
Control byte (for 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 (for 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 | Error | Temperature warning | Overload | Operation mode | Synchronous | ||
Key
Bit | Name | Description | |
|---|---|---|---|
SB.7 | RegAccess | 0bin | Acknowledgment for process data mode |
SB.6 | Error | 1bin | A load-side short circuit was detected |
SB.5 | Temperature warning | 1bin | Overtemperature detected (> 80°C): The process data are limited to 20% (the limitation is automatically reset when the temperatures falls below 60°C) |
SB.4 | Overload | 1bin | Overload detected (e.g. when switching higher loads on) |
SB.3 to SB.1 | Operation mode | 0dec | Full-wave control |
|
| 1dec | Mixed control |
SB.0 | Synchronous | 0bin | Terminal is not synchronized with the mains or a short circuit was detected on the load side |
1bin | Terminal has synchronized itself with the mains* | ||
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 | Acknowledgment 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. | |