Control and status byte
Process data mode
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 | StartCalibration | StartCalibration | disAutorange | Voltage/Current | DC/AC | Range | |
Bit | Name | Description | |
|---|---|---|---|
CB.7 | RegAccess | 0bin | Register communication off (process data mode) |
CB.6 | R/W | 0bin | Read access |
1bin | Write access | ||
CB.5 | StartCalibration | 1bin | initiates an automatic correction of the internal measuring range (only if register R33 = 4) |
CB.4 | disAutorange | 0bin | auto range enabled |
1bin | auto range disabled | ||
CB.3 | Voltage/Current | 0bin | Voltage |
1bin | Current | ||
CB.2 | DC/AC | 0bin | DC |
1bin | AC | ||
CB.1, CB.0 | Range | Measuring range (see also CB.2) | |
00bin | 3 V or 1 A | ||
01bin | 30 V or 10 A | ||
10bin | 300 V | ||
11bin | 300 mV or 100 mA | ||
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 | Error | - | noAutorange | data Invalid | extended range | overrange | underrange |
Bit | Name | Description | |
|---|---|---|---|
SB.7 | RegAccess | 0bin | Acknowledge for process data mode |
SB.6 | Error | 1bin | measuring range exceeded, over or under range, the error LED shines or converting error or invalid measuring range |
SB.5 | reserved | 0bin | reserved |
SB.4 | - | 0bin | auto range is enabled |
1bin | auto range is disabled | ||
SB.3 | data invalid | 1bin | invalidprocess data, e.g. invalid value, e.g. filter latency, start up |
SB.2 | extended range* | 1bin | The extended measuring range (~10% of upper range value) is used (hysteresis area of auto range functionality). |
SB.1 | overrange | 1bin | Exceeding of the electrical measuring range |
SB.0 | underrange | 1bin | Undershooting of the electrical measuring range at DC mode (not displayed in AC mode |
*) The extended range is only available for the measuring ranges 300 mV, 3 V, 30 V and 100 mA.
Register communication
Control byte (at 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 | Register no. | |||||
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 | Register no. | Register number: | |
Status byte (at 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 | Register no. | |||||
Bit | Name | Description | |
|---|---|---|---|
SB.7 | RegAccess | 1bin | Acknowledge for register access |
SB.6 | R | 0bin | Read access |
SB.5 to SB.0 | Register no. | Number of the register that was read or written. | |