Rockwell-automation T8110B/T8110 Trusted TMR Processor Manual de usuario descargar pdf (Pagina 21)

Trusted

TMR Processor T8110B/T8110

Issue 18 Feb 08 PD-T8110B/T8110 21

3.3. Inter-Module Bus

ach Processor FCR contains a Bus Interface to the Inter-Module Bus. The triplicated Inter-Module

Bus provides communication interconnection between modules in the Trusted

Controller chassis, at

a data transfer rate of up to 150Mbaud.

The Inter-Module Bus handles the following triplicated signals:

Data

- 8-bit, bi-directional bus.

Control

- Bus clocks, module enables and bus direction control.

System Watchdog

- A dynamic signal indicating the correct processing of

safety critical data. The signal is generated by the

hardware watchdog signal from each processor.

Power Fail

- Indicating a power fault in the associated fault

containment region.

Active/Standby

- Status line between the active/standby Trusted

TMR

Processors that are used for negotiating the

active/standby state.

Slot

- Indicating the left or right Trusted

TMR Processor slot

position to the processor.

System ID

- A 4 bit code indicating the system address to the

processor.

Additionally, a Chassis Connection signal is provided for grounding the module electromagnetic

interference shield.

3.3.1. Processor Memory Voting Bus

The Processor memory voting bus is 32-bits wide and provides real-time voting of memory read

cycles.

3.3.2. Inter-Module Bus Voting Bus

Data received from the Inter-Module Bus is processed via an independent voting bus. This bus

protects the three processor FCRs from a data fault, by exchanging data between them and the front-

panel FCR.

3.3.3. Processor Voting Bus

The Processor voting bus is a serial bus that provides fault protection for certain types of FCR signals.

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Rockwell-automation T8110B/T8110 Trusted TMR Processor Manual de usuario Pagina 21

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