The following performance data or measured variables are available to you:
The DP reaction time is the time between events 1 and 3:
A signal change occurs at an input of the distributed I/O.
The DP master responds by setting an output in the distributed I/O.
A signal change takes place at an output of the distributed I/O.
The reaction time is measured in systems that allow process alarms (via internal DP interface) via both the process image and OB1 (approx. 90% of the configured I/O peripherals) and via direct commands and a process alarm (approx. 10 of the configured I/O peripherals).
In systems where process alarms are not possible (via CP ), 100% of the configured I/O peripherals is mesured via process image and OB1.
Cycle time
This is the interval between two process image updates in the DP master.
HMI update time
The update time indicates the following runtime:
- A signal change occurs at an input of the distributed I/O
- The HMI panel indicates this change by means of a control element (change in color)
The operating time is the equivalent to the update time:
- An event (pressing a button) is triggered on the HMI panel
- An output of the distributed I/O is set
PPC update time
Like "HMI update time", but measured on a PanelPC (WinAC RTX also runs on this PC).
Like "HMI operating time", but measured on a PanelPC (WinAC RTX also runs on this PC).
Note:
For a detailed description of the methods of measurement, please refer to 3. Performing the Measurement.