Product Details
Product Description
Product Description
Brand: KOKUSAI
Type: BALEXT-SMP
Origin: the United States
Warranty: 365 days
Colour: new/used
Shipping method: Courier delivery
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.
If the primary unit fails because of an error, the backup unit resumes execution from the last rollback point, which means the last execution unit is partially re-executed by the backup unit. In order to re-execute a portion of the execution unit without affecting the peripheral units (communication units on the CEX-Bus), the peripheral units' references are also logged between rollback points. During re-execution, the results of the peripheral units' references, which have already been executed, are used, rather than re-executing them. The results of read operations are retrieved from the log, and write operations pass without execution, since they have already been executed. The peripheral units' statuses, then, are not affected by the reexecution in any way, except for the time delay which occurs.
>>
Remote Unmanned Rotorcraft Collision Preventioncustom Drone Agricola Reconnaissance Uav
>>
RGB 28W LED wall washer lights Led Wall Washer Led Lighting LED linear wall Led Building Lighting Decoration
>>
D704 Taper 0 CNC Machine Small Hole EDM Drilling
>>
Blades Grinding Machine for The Knives or Blades of Crusher and Shredder
>>
Shanghai Xiangbao XB-AT551-09 Dual Hydraulic Super Silent Paper Cutter
>>
Stainless Steel Sanitary Food Grade Round Outward Non Pressure Round Tank Manway Manhole Cover with EPDM Gasket
>>
Hot Selling Food Industry Conveyor Belt Bench Bag Check Weigher 2kg
>>
IC698CMX016 VMIVME-5567-000 350-005567-000 | GE FANUC MODULE PLC DCS In Stock
>>
High Speed Alcohol 4 Lanes Packing Machine Automatic Cotton Pads 4 Side Sealing Packing Machine
>>
comfortable expanded metal garden bench and chair
>>
3104392 Engine Valve Cover Gasket for Cummin s
>>
Solar Absorber Coating Solar Products Blue Selective Coating Solar Absorber
>>
Non-Woven Cross-Cutting Machine PVC Pet Film Computer Numerical Control Sheet Cutting Machine
>>
PP Bottle Making Machinery, One Step Injection Blow Moulding Machine
>>
Papua New Guinea liquid nitrogen tank cart KGSQ five-wheeled cart
>>
Blade Knife Sharpening Machine /Grinding Machine for Wood Veneer Peeling Machine
>>
High quality transparent glass film, window film dimming tempered glass can be customized
>>
Papaya Extract Papain Powder Plant and Herbal Extract Free Sample
>>
Carton/Cardboard Hydraulic Recycling Baling Machinery Vertical Baler Machine
>>
Lnk-Lj-03A1w Life Jacket Light
