高速计数器模组VB-1HC说明书(3)

适用于plc的工程应用人员

3.3Buffermemories

(BFM)

1)BFM#0Countermode(K0toK11),BFM#1DOWN/UPcommand

ThecountermodeisselectedfromthePLC.Asshownbelow,valuesbetweenK0andK11arewrittentobuffermemoryBFM#0formthePLC.WhenavalueiswrittentoBFM#0thecontentsofBFM#1toBFM#31areresettoWhensettingthisvalueusea(pulsed)useM9002(initialpulse)todrivetheinstruction.

Acontinuouscommandisnotallowed.

A32-bitbinarycounterwhichexecutesUP/DOWNcountingwillchangefromthelowerlimittotheupperlimitortheupperlimittothelowerlimitwhenoverflowoccurs.Boththeupperandlowerlimitsarefixedvalues:theupperlimitis+2,147,483,647,andthelowerlimitis-2,147,483,648.b)16-bitcountermodes

A16-bitbinarycounterhandlesonlypositivevaluesfrom0to65,535.Changestozerofromtheupperlimitortotheupperlimitfromzerowhenoverflowoccurs;theupperlimitisdeterminedbyBFMs#3and#2.c)1-phasecounter(K8to

K11)

d)2-phasecounter(K6,K7)

firstandcountere)

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库高速计数器模组VB-1HC说明书(3)在线全文阅读。