#####
1746-OAP12
存儲器
PLC內(nèi)的存儲器主要用于存放系統(tǒng)程序、用戶程序和數(shù)據(jù)等。
1)系統(tǒng)程序存儲器
PLC系統(tǒng)程序決定了PLC的基本功能,該部分程序由PLC制造廠家編寫并固化在系統(tǒng)程序存儲器中,主要有系統(tǒng)管理程序、用戶指令解釋程序和功能程序與系統(tǒng)程序調(diào)用等部分。
系統(tǒng)管理程序主要控制PLC的運行,使PLC按正確的次序工作;用戶指令解釋程序?qū)LC的用戶指令轉(zhuǎn)換為機器語言指令,傳輸?shù)紺PU內(nèi)執(zhí)行;功能程序與系統(tǒng)程序調(diào)用則負責調(diào)用不同的功能子程序及其管理程序。
系統(tǒng)程序?qū)儆谛栝L期保存的重要數(shù)據(jù),所以其存儲器采用ROM或EPROM。ROM是只讀存儲器,該存儲器只能讀出內(nèi)容,不能寫入內(nèi)容,ROM具有非易失性,即電源斷開后仍能保存已存儲的內(nèi)容。
EPEROM為可電擦除只讀存儲器,須用紫外線照射芯片上的透鏡窗口才能擦除已寫入內(nèi)容,可電擦除可編程只讀存儲器還有E2PROM、FLASH等。
1388B-AV10 ALLEN BRADLEY DRIVES REMANUFACTURED
1392-B050-RG-MC?-B-F2-D1-F4 ALLEN BRADLEY DRIVES REMANUFACTURED
A14B-0076-B001 FANUC DRIVES REMANUFACTURED
1305-BA01A ALLEN BRADLEY DRIVES REMANUFACTURED
A06B-6096-H106 FANUC DRIVES REMANUFACTURED
DDS03.1-W050-D INDRAMAT DRIVES REMANUFACTURED
A06B-6078-H211 FANUC DRIVES REMANUFACTURED
ID15V430-EO BALDOR DRIVES REMANUFACTURED
1388B-AV20 ALLEN BRADLEY DRIVES REMANUFACTURED
DDS02.1-W100-D INDRAMAT DRIVES REMANUFACTURED
DR-1005-000 MODICON DRIVES REMANUFACTURED
SGDA-01BPP YASKAWA DRIVES NEW
1336-B005-E0D-F?A2 ALLEN BRADLEY DRIVES REMANUFACTURED
1336-B005-EAD-L?3 ALLEN BRADLEY DRIVES REMANUFACTURED
A06B-6053-H334 FANUC DRIVES REMANUFACTURED
6SN1123-1AA00-0?DA0 SIEMENS DRIVES REMANUFACTURED
FR-A220E-5.5K-U?L MITSUBISHI DRIVES REMANUFACTURED
HDS03.2-W075N INDRAMAT DRIVES REMANUFACTURED
A06B-6093-H101 FANUC DRIVES REMANUFACTURED
14C303 RELIANCE DRIVES REMANUFACTURED
TDM1.2-100-W1 INDRAMAT DRIVES REMANUFACTURED
DDS02.1-W050-D INDRAMAT DRIVES REMANUFACTURED
3V4151 RELIANCE DRIVES REMANUFACTURED
TDM1.2-100-300-?W1-000 INDRAMAT DRIVES REMANUFACTURED
歡迎致電:18030132586
服務(wù)熱線:0592-5085329
詢價傳真:0592-5165561(請備注阿杰收)
工作QQ:1904676482
聯(lián)繫人:阿杰