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چرا SCAN Time در PLC متغیر است؟

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Sadeh

(@sadeh)

Reputable Member

عضو شده: 7 سال قبل

ارسال‌ها: 250

۱۲/۱۰/۱۴۰۱ ۶:۵۹ ب.ظ

سلام خدمت اساتید محترم

اگر در PLC فقط برنامه اصلی در حال اجرا باشه و برنامه وقفه هم نداشته باشه چرا اسکن تایم هر بار چند میلی ثانیه تغییر می کنه و ثابت نیست. منظورم اینه که سخت افزار و برنامه هیچ تغییری نکرده و اسکن تایم کمی جابجا میشه

با تشکر

نقل‌قول

kolahi

(@kolahi)

Estimable Member

عضو شده: 7 سال قبل

ارسال‌ها: 234

۱۳/۱۰/۱۴۰۱ ۹:۲۷ ب.ظ

سلام

اسکن تایم شامل موارد مختلف است :

خواندن ورودی ها و انتقال به PII
اجرای برنامه نرمال
ارسال خروجی ها از PIQ
اجرای وقفه ها
خواندن و نوشتن ورودی و خروجی های Periperal
انجام ارتباطات شبکه (برای مانیتورینگ و سایر مواردی که آنلاین هستند)

با توجه به عملیات فوق بدیهی است که حتی اگر برنامه نرمال ثابت باشد اسکن تایم در سیکل های مختلف یکسان نباشد ممکن است در یک سیکل وقفه ای باید اجرا شود و در سیکل بعدی خیر . یا در یک سیکل ارتباط شبکه زیادتر باشد

پاسخنقل‌قول

Sadeh

(@sadeh)

Reputable Member

عضو شده: 7 سال قبل

ارسال‌ها: 250

۱۴/۱۰/۱۴۰۱ ۶:۴۲ ب.ظ

@kolahi

خیلی ممنون . پس وقتی که آنلاین هستیم هم روی زمان اسکن تاثیر داره

پاسخنقل‌قول

آمار تالار گفتمان

6 تالارهای گفتمان

602 موضوعات

1,803 ارسال‌ها

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آخرین ارسال: راه اندازی کلاینت جدیدترین عضو ما: saeid ارسال های اخیر Unread Posts Tags

Forum Icons: Forum contains no unread posts Forum contains unread posts

آیکن های موضوع: Not Replied پاسخ داده شده فعال داغ مهم تایید نشده حل شده خصوصی بسته شده

Super Globals

Requests: Array ( )

Server: Array ( )

Options and Features

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url: https://mohandesmaher.com/forum/
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)
pageid:1729
default_groupid: 3
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    [attach_cant_view_msg] => شما مجاز به مشاهده این ضمیمه نمی‌باشید
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[4] => Array
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                    [url] => http://gvectors.com/
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[2] => Array
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[3] => Array
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                )

)

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)

)
classic