MICROSET 104988-E03多掃描控制面板
1.產(chǎn) 品 資 料 介 紹：
中文資料：
錯(cuò)誤檢查和校正，MICROSET 104988-E03冗余CPU附帶啟用錯(cuò)誤檢查和糾正（ECC）功能。啟用ECC會(huì)導(dǎo)致系統(tǒng)性能稍慢，主要是在通電期間，因?yàn)樗褂昧吮仨毘跏蓟念~外八位。如果在非冗余CPU型號(hào)上升級(jí)固件以支持冗余，則必須將ECC跳線設(shè)置為已啟用狀態(tài)，如升級(jí)工具包附帶的安裝說明所述。有關(guān)MICROSET 104988-E03的詳細(xì)信息，請(qǐng)參閱《MICROSET 104988-E03熱備用CPU冗余用戶手冊(cè)》，MICROSET 104988-E03。注意：當(dāng)檢測(cè)到單個(gè)位ECC錯(cuò)誤時(shí)，可能會(huì)生成多個(gè)可恢復(fù)內(nèi)存錯(cuò)誤錯(cuò)誤。當(dāng)檢測(cè)到一個(gè)單比特ECC錯(cuò)誤時(shí)，對(duì)提供給微處理器的值進(jìn)行校正。然而，存儲(chǔ)在RAM中的值直到微處理器下次寫入該RAM位置時(shí)才會(huì)被校正。每個(gè)CPU都有三個(gè)獨(dú)立的板載串行端口，可通過模塊前部的連接器訪問。COM1和COM2為外部設(shè)備提供串行接口；兩者都可以用于固件升級(jí)。第三個(gè)板載串行端口是一個(gè)專用的以太網(wǎng)MICROSET 104988-E03r端口。有關(guān)串行端口引腳分配、電氣隔離和串行通信的詳細(xì)信息，請(qǐng)參閱第5章。MICROSET 104988-E03
英文資料：
Error Checking and Correction, MICROSET 104988-E03Redundancy CPUs are shipped with error checking and correction (ECC) enabled. Enabling ECC results in slightly slower system performance, primarily during power-up, because it uses an extra eight bits that must be initialized. If you upgrade the firmware on a non-redundancy CPU model to support redundancy, you must set the ECC jumper to the enabled state as described in the installation instructions provided with the upgrade kit. For details on ECC, refer to the PACSystems Hot Standby CPU Redundancy User Manual,MICROSET 104988-E03. Note: Multiple Recoverable Memory Error faults may be generated when a single-bit ECC error is detected. When a single-bit ECC error is detected, the value presented to the microprocessor is MICROSET 104988-E03corrected. However, the value stored in RAM is not corrected until the next time the microprocessor writes to that RAM location.Each CPU has three independent, on-board serial ports, accessed by connectors on the front of the module. COM1 and COM2 provide serial interfaces to external devices; either can be used for firmware upgrades. The third on-board serial port is a dedicated Ethernet Station Manager port. For serial port pin assignments, electrical isolation and details on serial communications, refer to Chapter 5.MICROSET 104988-E03
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