Process data objects

DEV Inputs Device

"DEV Inputs Device" contains status bits for diagnostic messages that affect the entire box.

Process data objects 1:

Undervoltage Us
Undervoltage of the supply voltage US.
As a result, all sensor supply outputs are switched off.

Overtemperature
Internal overtemperature. All sensor supply outputs are deactivated.
The bit is reset and the sensor supply outputs are automatically reactivated when the temperature has dropped again.

Diag
Without function. Reserved for future use.

TxPDO State
Validity of the input data. This bit is set if the input data could not be read correctly due to an error.

Input cycle counter
A 2-bit counter. It is incremented each time the input data is updated in the process image. After it reaches its maximum value of 3, it jumps back to 0.

DIP Diagnosis

"DIP Diagnosis" contains the status bits of the wire break detection. See chapter Wire break detection (EP1839-0022, EP1839-0042).
If a status bit has the value 1, a wire break has been detected at the corresponding input.

As an alternative to "DIP Diagnosis", you can enable the process data object "DIP Extended Diagnosis". See section "DIP Extended Diagnosis".

Process data objects 2:

The variable names are structured as follows:

Process data objects 3:

DIP Extended Diagnosis

"DIP Extended Diagnosis" is an extension of the process data object "DIP Diagnosis" with additional status bits. With the EP1839-0042, it is only available in firmware 02 and higher.

"DIP Extended Diagnosis" is disabled in the factory settings. The procedure for enabling a process data object can be found in the chapter Enabling individual process data objects.

Process data objects 4:

The variable names are structured as follows:

Process data objects 5:

A "Wirebreak" bit has the value 1 if a wire break has been detected at the respective input. See also Chapter Wire break detection (EP1839-0022, EP1839-0042).

A "Power Supply Missing" bit has the value 1 if the supply voltage output at the respective connection is switched off , e.g. due to overload.

In both cases, the input value of the respective channel is potentially invalid.

DIP Input

"DIP Input" contains the input variables of the digital inputs.

Process data objects 6:

The variable names are structured as follows:

Process data objects 7:

DOS Diagnosis

Process data objects 8:

Disabled diagnostic functions

In the factory setting, the diagnostic functions "Open Load" and "Short to 24V" are disabled and the corresponding status bits always have the value 0.

To enable them, set the corresponding parameters in the CoE objects 0x81n0 to TRUE.

"DOS Diagnosis" contains the status bits for the sensor power supply outputs.

This process data object is deactivated in the factory setting. You can enable it by setting the Predefined PDO Assignment "16 DI full diagnosis 8 DO sensor supply", see chapter Adapt process image (EP1819-0005, EP1839-0022, EP1839-0042).

Process data objects 9:

If an error is detected at a sensor power supply output, the error is additionally signaled by the status LEDs at the corresponding connection. See chapter EP1839-0022, EP1839-0042.

DOS Output

"DOS Output" contains the output variables of the digital outputs.

This process data object is deactivated in the factory setting. You can enable it by setting the Predefined PDO Assignment "16 DI full diagnosis 8 DO sensor supply", see chapter Adapt process image (EP1819-0005, EP1839-0022, EP1839-0042).

Process data objects 10:

The variable names are structured as follows:

Process data objects 11: