PN主题的文章列表，还有PN的技术要点_第1页

西门子plc 3pn/dp是什么意思

PN是代表PLC集成了PROFINET口，也可以说是以太网口。DP是代表PLC集成了PROFIBUS-DP口。3PN/DP是：X1:MPI/DPX2:DPX3:PN-IO两个端口2PN/DP是：X1:MPI/DPX2:PN-IO两个端口（PROFINETIO-Controller;supportsRT/IRT;PROF...

开发笔记 ·2024-09-29

echarts symbol png格式图片在pc端显示移动端不显示的问题

将图片转为base64位。points[i]={displayName:node.name,name:node.id,symbol:'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADYAAAA2CAYAAACMRWrdAAAACXBIWXMAAA7EAAAOxAG...

开发笔记 ·2024-09-11

PHP简单实现图片格式转换(jpg转png，gif转png等)

依赖php扩展gd和exif实现/***图片格式转换*@paramstring$image_path文件路径或url*@paramstring$to_ext待转格式，支持png,gif,jpeg,wbmp,webp,xbm*@paramnull|string$save_path存储路径，null则返回二进制内容，str...

开发笔记 ·2024-07-01

解决npm、yarn、pnpm设置国内镜像源(淘宝)不生效

如果在使用npm、yarn或pnpm时设置了国内镜像源，但发现设置不生效，可能有以下几个原因：网络问题：确保你的网络连接正常，而且能够访问所设置的镜像源。有时候，网络问题可能导致无法正确拉取依赖。缓存问题： npm、yarn、pnpm等工具会在本地缓存一些数据，例如包和元数据。如果之前已经使用了其...

开发笔记 ·2024-03-12

ORA-07880: sdopnf: internal error

文档解释ORA-07880:sdopnf:internalerrorCause:Alistofallfilesopenbythisprocesscouldnotbeobtained.Action:Thisisaninternalerror.Contactyourcustomersupportrepresentative...

IT技术学习 ·2023-07-28

ORA-17503: ksfdopn:string Failed to open file string

文档解释ORA-17503:ksfdopn:stringFailedtoopenfilestringCause:fileopenfailedduetoeitherinsufficientOSpermissionorthenameoffileexceedsmaximumfilenamelength.Action:chec...

IT技术学习 ·2023-07-28

ORA-29783: GPnP attribute SET failed with error [string]

文档解释ORA-29783:GPnPattributeSETfailedwitherror[string]Cause:AttempttosettheGPnPattributefailed.Seethebracketsforthereason.Action:Resolvetheproblemintheincludedme...

IT技术学习 ·2023-07-26

ORA-07550: sftopn: $CONNECT failure

文档解释ORA-07550:sftopn:$CONNECTfailureCause:VMSsystemservice$OPENfailedAction:ExaminesystemerrormessageandrefertoVMSdocumentationORA-07550错误指示特定用户尝试从多次连接到Oracle数据...

IT技术学习 ·2023-07-26

ORA-07391: sftopn: fopen error, unable to open text file.

文档解释ORA-07391:sftopn:fopenerror,unabletoopentextfile.Cause:Fopenlibraryroutinereturnedanerror.Action:Verifyexistenceandpermissions.ORA-07391:sftopn的错误是由于尝试打开一个文...

IT技术学习 ·2023-07-23

ORA-09755: osngpn: port allocation failure.

文档解释ORA-09755:osngpn:portallocationfailure.Cause:Theport_allocatesystemcallfailed.Action:Possiblesystemresourceshortage;checktheerrorcodeinsercerrno.ORA-09755:o...

IT技术学习 ·2023-07-19

ORA-07390: sftopn: translate error, unable to translate file name.

文档解释ORA-07390:sftopn:translateerror,unabletotranslatefilename.Cause:Anerroroccurredwhileexpandingthefilenametoopen.Additionalinformationreturnserrorgeneratedint...

IT技术学习 ·2023-07-18

ORA-29780: unable to connect to GPnP daemon [string]

文档解释ORA-29780:unabletoconnecttoGPnPdaemon[string]Cause:AttempttoconnecttotheGPnPdeamonfailedwiththeerrorreported.Action:Takethecorrectiveactiontoresolvetheerror...

IT技术学习 ·2023-07-17

ORA-13530: invalid TOPNSQL string, must be in the range (string, string)

文档解释ORA-13530:invalidTOPNSQLstring,mustbeintherange(string,string)Cause:TheuserhasspecifiedaTOPNSQLsettingthatisnotinthesupportedrangeof(MIN,MAX).Action:Choosea...

IT技术学习 ·2023-07-16

ORA-07548: sftopn: Maximum number of files already open

文档解释ORA-07548:sftopn:MaximumnumberoffilesalreadyopenCause:ToomanytestfilesopenAction:Thisisaninternalerror,pleasereporttoOracle说明ORA-07548错误代表一个特定的错误，它表明您试图打开的文...

IT技术学习 ·2023-07-13

ORA-09210: sftopn: error opening file

文档解释ORA-09210:sftopn:erroropeningfileCause:IncorrectpathmayhavebeenspecifiedforthefileAction:SeeOSDerroraccompanyingthismessageORA-09210:sftopn:erroropeningfile...

IT技术学习 ·2023-07-10