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اسکیل آنالوگ با قابلیت فریز کردن آخرین مقدار در صورت بروز فالت

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Hamid

(@hamid)

Estimable Member

عضو شده: 5 سال قبل

ارسال‌ها: 126

۰۲/۰۳/۱۴۰۱ ۷:۰۰ ب.ظ

درود بر همکاران

همونطور که میدونید فانکشن Scale زیمنس عملکردش اینه که در صورت بروز فالت خروجی Ret_Val =8 میشه و خروجی out روی Hi_Lim یا Lo_Lim ست میشه.

من میخام خودم ی اسکیل بنویسم با این تفاوت که وقتی فالت مثه وایر بریک یا قطعی تغذیه AI رخ میده آخرین مقدار قبل از فالت را در خروجیش نگه داره و آلارم بده

با SCL برنامه اش را نوشتم که اینه

Error:=0;

currentVal:= ((Hi-Lo)/27648)*Analog + Lo;

IF error=0 THEN Out:= currentVal; ELSE Out:= oldVal; END_IF;

IF Analog<0 OR Analog>27648 THEN Error:=1 ; END_IF;

oldVal:= currentVal;

ولی مشکلم اینه که در زمان وایر بریک قبل از اینکه سیگنال به می نیمم برسه جریان تغییرات جزیی داره که در بازه معتبره به همین علت مقدار فریز که نشون میده مقدار معتبر قبلی نیست بلکه مقداری است که مربوط به تغییرات جریان در زمان قطعی در بازه معتبره

متوجه شدم که اگر ی تاخیر در زمان محاسبه فریز شدن بندازم مشکل حل میشه ولی نمیدونم در SCL چطوری از تایمر استفاده کنم

اگر میدونید لطفا بفرمایید

نقل‌قول

kolahi

(@kolahi)

Estimable Member

عضو شده: 7 سال قبل

ارسال‌ها: 234

۰۳/۰۳/۱۴۰۱ ۵:۲۲ ب.ظ

سلام

بنظر من حتی اگر تایمر به برنامه اضافه کنید برای wire break جواب نمی گیرید

ی راه اینه که دیتاها را در چنر سیکل ذخیره کنید و در صورت قطعی سیم دیتای چند سیکل قبلی که فرضاً مربوط به 1 ثانیه قبل هستش را روی خروجی فریز کنید.

پاسخنقل‌قول

kolahi

(@kolahi)

Estimable Member

عضو شده: 7 سال قبل

ارسال‌ها: 234

۰۳/۰۳/۱۴۰۱ ۱۰:۲۵ ب.ظ

با سلام دوباره

چون بنظرم برنامه جالبی اومد وقت گذاشتم کاملش کردم تستش هم جواب داد متن برنامه را براتون میفرستم. با لبه مثبت پالس (فرضاً پالس یک ثانیه) مقدار معتبر فعلی در Oldval ذخیره میشه تا در صورت بروز فالت در خروجی فریز بشه

موفق باشید

FUNCTION_BLOCK FB1

VAR_INPUT

analog:INT;

hi_lim , lo_lim: REAL;

pulse:BOOL;

END_VAR

VAR_OUTPUT

error:BOOL;

out:REAL;

END_VAR

VAR

currentval , oldval:REAL; ;

mem:BOOL;

END_VAR;

error:=0;

currentval:=((Hi_lim-Lo_Lim)/27648.0)*analog + Lo_lim;

IF analog>27648 OR analog<0 THEN error:=1; END_IF;

IF error THEN out:= oldval; ELSE out:=currentval; END_IF;

IF pulse AND NOT mem AND error=0 THEN oldval:=currentval; END_IF;

mem:=pulse;

END_FUNCTION_BLOCK

پاسخنقل‌قول

Hamid

(@hamid)

Estimable Member

عضو شده: 5 سال قبل

ارسال‌ها: 126

۰۷/۰۳/۱۴۰۱ ۴:۱۹ ب.ظ

@kolahi

بسیارعالی

ببخشید از اینکه وقتتون را گرفتم

پاسخنقل‌قول

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