The functional model below shows the passage of the signal of the
measured variable "DP response time" through the measuring setup.
Not the intervals Tx but the total time is measured. The following applies:
DP response time = T1 + T2 + T3 + T4 + T5 + T6 + T7
The following table describes the intervals Tx:
| Time | tx as from/until | |
|---|---|---|
| T1 | from | Terminal DIx |
| until | DP slave image | |
| T2 | from | DP slave image |
| until | DP master image | |
| T3 | from | DP master image |
| until | Process image | |
| T4 | from | Reading the signal from the process image |
| until | Writing signal into process image | |
| T5 | from | Process image |
| until | DP master image | |
| T6 | from | DP master image |
| until | DP slave image | |
| T7 | from | DP slave image |
| until | Terminal DOy | |