1. 設(shè)計(jì)和功能
根據(jù)統(tǒng)計(jì)數(shù)字表明，所有自動(dòng)化組件（無論是機(jī)械式、機(jī)電式，還是電子式）都會(huì)出現(xiàn)故障。因此，工廠維護(hù)和工廠改造也就必不缺少。在實(shí)際應(yīng)用中，期待的可用性是不現(xiàn)實(shí)的。通過西門子 SIMATIC S7-400H，能夠較大限度地降低生產(chǎn)故障機(jī)率，較大化生產(chǎn)率。
SIMATIC S7-400H 具有以下功能：出現(xiàn)故障時(shí)，能夠無擾切換。 集成故障檢測(cè)功能；提前檢測(cè)故障，避免影響生產(chǎn)過程。在線維護(hù)，即可在工廠運(yùn)行期間，更換故障組件。組態(tài)更改，即可在工廠運(yùn)行期間，進(jìn)行工廠擴(kuò)容。自動(dòng)事件同步，高可用性通信，冗余連接I/O 設(shè)備。
S7-400 PNH CPU的同步分為兩種，一種用于長(zhǎng)10m 的 FOC patch 光纖，另一種用于長(zhǎng)10km 的單模全雙工 LC/LC 光纖（9/125 μ）。冗余系統(tǒng)的同步光纖分為1m、2m、10m 和10km 四種。同步速率達(dá)到400Mbps。
FANUC A20B-8200-0845 Tested in Good condition
FANUC A20B-8200-0843 Tested in Good condition
FANUC a20b-8200-0792 Tested in Good condition
FANUC A20B-8200-0780 Tested in Good condition
FANUC A20B-8200-0760 Tested in Good condition
FANUC A20B-8200-0724 Tested in Good condition
FANUC A20B-8200-0721 Tested in Good condition
FANUC A20B-8200-0542 Fast ship with warranty
FANUC A20B-8200-0472 board tested
FANUC A20B-8200-0471 Tested in Good condition
Fanuc A20B-8200-0470 PCB Board In Good Condition
FANUC A20B-8200-0396 Tested in Good condition
FANUC A20B-8200-0393 Tested in Good condition
FANUC A20B-8200-0392 Tested in Good condition
FANUC A20B-8200-0391 Tested in Good condition
FANUC A20B-8200-0385 Tested in Good condition
FANUC A20B-8101-0770 Tested in Good condition
FANUC A20B-8101-0401 Tested in Good condition
FANUC A20B-8101-0375 Tested in Good condition
FANUC A20B-8101-0374 Tested in Good condition
FANUC A20B-8101-0350 Tested in Good condition
FANUC A20B-8101-0281 In Good Condition
Fanuc A20B-8101-0170 Fast ship with warranty
FANUC A20B-8101-0120 Tested in Good condition
Fanuc A20B-8101-0023 Tested in good condition
FANUC A20B-8100-0981 Tested in Good condition
Fanuc A20B-8100-0980 Tested in Good condition
FANUC A20B-8100-0920 Tested in Good condition
Fanuc A20B-8100-0791 Tested in Good condition
Fanuc A20B-8100-0665 Board In Good Condition
FANUC A20B-8100-0663 Tested in Good condition
Fanuc A20B-8100-0660 PCB Board In Good Condition
FANUC a20b-8100-0547 Tested It In Good Condition
FANUC A20B-8100-0410 Tested in Good condition
FANUC A20B-8100-0301 Tested in good condition
FANUC A20B-8100-0170 Tested in Good condition
Fanuc A20B-8100-0137 Motherboard In Good Condition
FANUC A20B-8100-0136 Tested in Good condition
FANUC a20b-8100-0131 Tested in Good condition
FANUC A20B-8100-0130 Tested in Good condition
Fanuc A20B-3900-0304 Fast ship with warranty
Fanuc a20b-3300-0878 Fast ship with warranty
FANUC A20B-3300-0820 Tested in Good condition
Fanuc A20B-3300-0774 PCB Board In Good Condition
FANUC A20B-3300-0768 Tested in Good condition
Fanuc a20b-3300-0671 Fast ship with warranty
Fanuc A20B-3300-0479
FANUC A20B-3300-0398 CPU board tested
Fanuc A20B-3300-0395 Fast ship with warranty
FANUC A20B-3300-0361 Tested It In Good Condition
Fanuc a20b-3300-0202 Tested in Good condition
Fanuc A20B-3300-0200 Tested in Good condition
FANUC A20B-3300-0151 Tested in Good condition
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