TwinCAT 3 Login及Online界面常见问答: 更新PLC程序后重新激活并Login，出现Login failed for application 'Port_851'，调试电脑报错file tranfer error

1. TwinCAT 3 Login及Online界面常见问答
- 1.1. TwinCAT3 修改程序后，Login时提示 “Cancel login. No code change possible - x other user logged in. ”的原因。
- 1.2. TwinCAT3 Login登录之后Online无法显示在线监控窗口。变量区可以正常监控，程序区域不显示变量当前数值。
- 1.3. 更新PLC程序后重新激活并Login，出现Login failed for application 'Port_851'，调试电脑报错file tranfer error
- 1.4. Login查看程序中自定义Function中的变量值都是问号
- 1.5. Login之后，为什么输入变量置为TRUE了之后，输出变量还是FALSE？
- 1.6. 变量声明区内默认显示方式与表格模式如何切换？
- 1.7. Online界面为什么显示的是16进制？如何切换为10进制、2进制？
- 1.8. TwinCAT 3数组变量Online只能显示前999个，如何更改显示范围？

May 2025

Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
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1 event, Monday, 12 May 12 TwinCAT 3 入门 more TwinCAT 3 入门 1 event, Monday, 12 May 12	1 event, Tuesday, 13 May 13 TwinCAT 3 入门 more TwinCAT 3 入门 1 event, Tuesday, 13 May 13	1 event, Wednesday, 14 May 14 TwinCAT 3 入门 more TwinCAT 3 入门 1 event, Wednesday, 14 May 14	1 event, Thursday, 15 May 15 OOP 分拣机 more OOP 分拣机 1 event, Thursday, 15 May 15	1 event, Friday, 16 May 16 OOP 分拣机 more OOP 分拣机 1 event, Friday, 16 May 16	No events, Saturday, 17 May No events, Saturday, 17 May	No events, Sunday, 18 May No events, Sunday, 18 May
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