Rockwell Automation T8110B/T8110 Trusted TMR Processor - Manual (Page 30)

Trusted
TM
TMR Processor T8110B/T8110
Issue 18 Feb 08 PD-T8110B/T8110 30
4.7.6. Example Calculation
As an example, consider a simple Trusted TM system with the following configuration:
Part No. Description Qty. Type
T8110B Trusted TM TMR Processor 1 N/A
T8151B Trusted TM Communication 2 Central
T8403 Trusted TM TMR 24Vdc Digital Input 4 Input
T8431 Trusted TM TMR Analogue Input 1 Input
T8451 Trusted TM 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