METSO PDP601

Product Details

Product Description

Product Description
Brand: METSO
Type:PDP601
Origin: the United States
Warranty: 365 days
Colour: new/used
Shipping method: Courier delivery
Following a changeover, the system operates as a system without redundancy with only one processor unit in operation. You can replace the malfunctioning processor unit while the system is running. After the replacement is carried out, the system once again has a redundant processor unit. If an error arises in the backup unit, you can also replace the backup unit while the system is running. Errors which occur in the backup unit can never affect the primary unit's operation. The primary unit and the backup unit are logically separated from one another. Hardware errors in the primary processor unit cause the system to perform a correct changeover. These hardware errors are single errors. The application programming and the communication are totally unaffected by the redundancy. PM86x/TP830 Redundancy The PM861/PM864/PM865/PM866 has an RCU Link Connector for connecting the RCU Link Cable (see Figure 2 on page 32). 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 (see Figure 29 on page 93). 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 (see Figure 55 on page 161). 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.

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