Process image

The process image is automatically adapted to the selected I/O functions. It always contains exactly those process data objects that are required for the evaluation or control of these I/O functions.
The procedure for selecting the I/O functions is described in the chapter Selection of I/O functions.

For multi-channel I/O functions, the following figures show the process data objects for channel 1 as an example. The process data objects for the other channels have the same content.

DEV Inputs

Process image 1:

Diag
Indicates that a new Diag Message is available. See chapter Diag Messages.

TxPDO State
Validity of the input data. This bit is 1 if the input data could not be read correctly due to an error.

Input Cycle counter
A 2-bit counter is incremented each time the input data in the process image is updated.

AI Inputs

Process image 2:

Underrange
Nominal measuring range undershot.

Overrange
Nominal measuring range exceeded.

Limit 1
Status of limit value monitoring, see chapter Limit value monitoring (Limit).

Limit 2
Status of limit value monitoring, see chapter Limit value monitoring (Limit).

Error
One of the measuring range error thresholds has been exceeded or undershot.
The current measured value "Value" is invalid.

Value
The current measured value as a 16-bit integer.
Please note: "Extended Range" mode is activated in the factory setting.
Information on evaluating the measured value can be found in the chapter Analog input.

AO Inputs

Process image 3:

Underrange
Nominal output range undershot.

Overrange
Nominal output range exceeded.

Error
One of the output range error thresholds has been exceeded or undershot.

AO Outputs

Process image 4:

Analog output
The output setpoint as a 16-bit integer.
Please note: "Extended Range" mode is activated in the factory setting.
You can find information on calculating the setpoint in the chapter Analog output.

DIP Inputs

Process image 5:

Input
The current logic level at the digital input.

DOS Outputs

Process image 6:

Output
Switch digital output.

ENC Inputs

Depending on the ModuleGroup selected, only a subset of the input data shown below is available in the process data.

Process image 7:

Latch extern valid
The counter value was saved via the latch input.
(only for “ENC_L_G”)

Set counter done
Confirms that the counter value has been set via ENC Outputs > Set counter.

Counter underflow
Lower counter limit undershot. The bit is reset when the counter value has fallen below 2/3 of the counting range.

Counter overflow
Upper counter limit exceeded. The bit is reset when the counter value has exceeded 1/3 of the counting range.

Status of input A

  • When configured as a counter: Current logic level at input "CNT Clk".
  • When configured as an encoder input: Current logic level at input "A".

Status of input B

  • When configured as a counter: Current logic level at input "CNT Dir".
  • When configured as an encoder input: Current logic level at input "B".

Status of input gate
Current logic level of the gate input.

Software gate valid
Indicates that the counter has been locked via ENC Outputs Channel n" > "Set software gate".

Status of extern latch
Current logic level of the latch input.
(only for "ENC_L_G")

Status of output
Current logic level of the threshold output.
(only for "CNT_OUT_DO" and "ENC_OUT_DO")

Counter value
Current counter value.

Latch value
Latch value.
(only for "ENC_L_G")

ENC Outputs

Depending on the ModuleGroup selected, only a subset of the input data shown below is available in the process data.

Process image 8:

Enable latch extern on positive edge
Enables saving of the counter value via the latch input with positive edge.

Set counter
A positive edge sets the counter value to the value set in "Set counter value". To confirm, the status bit "Set counter done" goes to 1.

Enable latch extern on negative edge
Enables saving of the counter value via the latch input with negative edge.

Set output
Controls the threshold output if "Enable output functions" = 0.
Is ignored if "Enable output functions" = 1.

Enable output functions
Enables the automatic switching of the threshold output at the counter values "Switch on threshold value" and "Switch off threshold value".

Set software gate
Locks the current counter value.
To confirm, the status bit "Software gate valid" is set to 1.

Set counter value
Counter value default for "Set counter".

Switch on threshold value
If the counter value exceeds this value, the threshold output is switched on.
Prerequisite: "Enable output functions" is 1.

Switch off threshold value
If the counter value exceeds this value, the threshold output is switched off.
Prerequisite: "Enable output functions" is 1.

PWM Outputs

Process image 9:

PWM output
Duty cycle of the PWM output.
Value range: 0...65535 corresponding to 0...100 %.

PWM period
Period of the PWM output. Unit: µs, value range: 40...50000.
This value influences the resolution of the PWM signal, see chapter Specifying the period.