ABB PM810V2 S800 Processor 3BSE013220R1

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Item NO.:
ABB PM810V2
Payment:
T/T
Product Origin:
Sweden
Shipping Port:
HongKong
Lead Time:
3 days
Goods Stock:
10
Order(MOQ):
1

Product Detail

ABB PM810V2 S800 Processor 3BSE013220R1

Contact：cassiebirthdayparty@gmail.com

The serial port, COM3 on the baseplate TP830, cannot be used in redundant CPU configuration.

The PM861/PM864/PM865/PM866 has an RCU Link Connector for connecting the RCU Link Cable. In a redundant system the two processor units are linked together with the RCU Link Cable (max 1 m). Both processor units are also connected to the same CEX-Bus and either of the two can control the expansion units.S800 I/O units are connected to the two CPUs via the optical ModuleBus and two TB840 cluster modems on each S800 I/O cluster . The built-in electrical ModuleBus on the TP830 baseplate cannot be used for connecting S800 I/O in a redundant system.

PM891 Redundancy

The Redundancy Link in PM891 consists of two physical links. These are the RCU Data Link and the RCU Control Link. The RCU Data Link is a fast communication channel used to transfer the data required to keep the backup CPU synchronized with the primary CPU.

TK855 RCU Data Link Cable is used for the data link. The RCU Control Link is used for role selection and CPU identity assignment (UPPER/LOWER).

TK856 RCU Control Link Cable is used for the control link.Fault Tolerance Principle The principle of fault tolerance in the redundant processor units is based on continuous updating of the backup unit to the same status as the primary unit. This enables the backup unit to assume control without affecting surrounding systems in a bumpless manner.

This principle involves dynamic division of the program execution into execution units and the creation of rollback points at which the processor unit's status is completely defined.

In this context, the processor unit's total status is defined as the processor unit's internal status, that is, the contents of the processor registers, plus the contents of the data memory. The backup unit's status is updated each time the primary unit passes a rollback point, enabling the backup unit to resume program execution from the last rollback point passed, should the primary unit fail due to error.

In order to minimize the amount of information involved in the update, the backup unit is updated only with the changes taking place since the latest rollback point. Between rollback points, these changes that writes in the data memory, are stored in a log buffer in the backup unit. At a rollback point, the processor's total register contents are also written into the data memory, so that this information is also logged. Once the rollback point is established, the logged write operations are transferred to the backup unit's data memory.

ABB PM810V2 Technical drawing:

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