Rockwell-automation T8110B/T8110 Trusted TMR Processor Instrukcja Użytkownika Pobierz pdf (Strona 30)

Trusted

TMR Processor T8110B/T8110

Issue 18 Feb 08 PD-T8110B/T8110 30

4.7.6. Example Calculation

As an example, consider a simple Trusted

system with the following configuration:

Part No. Description Qty. Type

T8110B Trusted

TMR Processor 1 N/A

T8151B Trusted

Communication 2 Central

T8403 Trusted

TMR 24Vdc Digital Input 4 Input

T8431 Trusted

TMR Analogue Input 1 Input

T8451 Trusted

TMR 24Vdc Digital Output 2 Output

This is a relatively small system with 280 I/O points and 2 communication modules.

Module Type No. Installed Time

Standby TMR Processor Module 0 x 4 ms 0 ms

TMR Interface Module 0 x 15 ms 0 ms

Communications Interface Module 2 x 4 ms 8 ms

Central Module Total 8 ms

Module Type No. Installed Time

Standby TMR Processor Module 0 x 1 ms 0 ms

TMR Interface Module 0 x 0.8 ms 0 ms

Communications Interface Module 2 x 1.5 ms 3 ms

Scan Factor 3 ms

Scan Factor No. Input Modules Input Total

( 3 ms + 4.5 ms ) x 5

37.5 ms

Scan Factor No. Output Modules Output Total

( ( 3 ms x 2 ) + 7.6 ms ) x 2

27.2 ms

No. I/O Modules Application Execution Total

( ( 7 + 5) x 1.5 ms )

18 ms

Central Module Total

8.0 ms

Input Module Total

37.5 ms

Output Module Total

27.2 ms

Application Execution Total

18.0 ms

Composite Scan Time 90.7 ms

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 36 37 38

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