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Предыдущие результаты
 Процедура заключается в подаче напряжения через токоограничивающий резистор в течении определенного времени.
The Issue:
In the past, Rockwell Automation has received numerous information requests from customers pertaining to drives that have not had power applied to them for a long period of time. The major concern regarding the Drives would be the affect of time on the Aluminum Electrolytic Capacitors. Bus Capacitors that have not had power applied to them for a period of 4 years or longer should undergo a Bus Capacitor re-forming process.
What is Re-forming?
Re-forming is a technical term used with capacitors that have been unpowered for a long time. To understand the re-forming process, we must first understand the forming process. To create any capacitor, three items are needed: 1.) An Anode (positive end), 2.) A Cathode (negative end), and 3.) A dielectric inserted between the two foils. An Aluminum Electrolytic capacitor follows this basic formula using aluminum foil both as the anode and the cathode, with an aluminum oxide formed on the foil as a dielectric and liquid electrolyte as a conductor. Capacitance is directly related to the surface area of the anode foil; the more surface area, the greater the capacitance. To increase the surface area of the anode foil, manufacturers dip the foil into an acid bath. This bath etches grooves into the foil, thus increasing the surface area (see figure 1). After this process, a non-conductive, insulating aluminum oxide, Al2O3, is grown on the surface of the aluminum anode and cathode foil, including the etched grooves. A thin paper layer is added between the foils to prevent them from rubbing against each other and to hold/absorb the conductive electrolyte that is used to reduce the distance between the anode and cathode. The aluminum oxide formed on the foil is the insulator between the positive and negative plates, but the aluminum oxide formed on the foil is a brittle material. When this oxide cracks, a leakage current will flow between the anode and cathode. This does not cause the capacitor to fail. In fact, the
leakage current causes localized heating, which creates more oxide, thus sealing off the leak. Unfortunately, after a prolonged period of time, four to five years, with a lack of voltage applied to an aluminum electrolytic capacitor, the oxide will start to breakdown and the leakage current will be very high. If voltage is applied to the capacitors at this point, the high leakage current (ripple current) could cause enough heating to vaporize the electrolyte in the capacitor causing the part to vent or potentially explode.
To prevent this from happening, the capacitors need to be re-formed. Re-forming is the process of re-growing the oxide in the grooves of the aluminum foil. The simple way to re-form an aluminum electrolytic capacitor is to apply a controlled DC voltage. The DC voltage will create the proper amount of leakage current that will form new oxide.
How do you Re-form?
The best way to re-form the bus capacitors would be to individually apply the capacitor.s rated DC voltage through a current limited resistor (~ 300 Ohms minimum) for period of 1 hour. However, this would require disassembling the entire drive. Some Rockwell Automation Drives are equipped for common bus applications, these drives have a plus and minus DC voltage input on the power terminal block connector. With the Rockwell Automation Drives that have this configuration, a high voltage (~ 800V) DC power supply used in series with the current limiting resistor would be connected to the terminal block to apply the rated DC voltage for an hour. Disconnect the Drives control boards and I/O boards prior to applying the DC voltage. Otherwise, the external power supply will turn on the Drive and in the process draw too much current and overload the supply. With the Rockwell Automation Drives that do not have this terminal block configuration, the other option is to apply the input line voltage to the Drive, the current limited resistor should still be used in series with the input power. Then allow the drive to power-up, thus applying bus voltage across the capacitors and re-forming them. Allow the drive to sit in this state for at least an hour prior to operating the drive.
Experiment and Results:
Several bus capacitors that had not had any applied voltage in seven years were tested in an attempt to verify the re-forming process. The capacitors had full rated voltage applied to them using an external DC power supply through a 1k Ohm resistor. A current meter was also used to watch the leakage current in the capacitor. Once the DC voltage was applied the leakage current started high and dropped rapidly. After a few minutes, the leakage current leveled off and the capacitors were successfully re-formed.
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Фото-видео-повесть "Хубсугул-2009" окончена. 12 глав. Фото, панорамы, анимашки.
http://www.ar-video.xost.ru/Hubsugul_2009.htm
[img:da8ccfd56c]http://www.arvideo.by.ru/GIF/HUBSUGUL2009/HAYNEK3.gif[/img:da8ccfd56c]
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[quote:c469ee9c0b="katod"]И где найти 1761-um006_-en-p.pdf? (может какой-нибудь адрес подскажите)[/quote:c469ee9c0b] :o
См. внимательно сообщения выше - там была прямая ссылка.
Или по сл. ссылке:
http://literature.rockwellautomation.com/idc/groups/public/documents/webassets/browse_category.hcst
Или на этой-же странице слева:
[URL=http://piccy.info/][img:c469ee9c0b]http://i.piccy.info/i4/28/6e/0fc0673e887685900e2470d49d83.jpeg[/img:c469ee9c0b][/URL]
Но там кое-что придется набрать руками:
[URL=http://piccy.info/][img:c469ee9c0b]http://i.piccy.info/i4/f9/44/c9772d378f378bc518507def9f62.jpeg[/img:c469ee9c0b][/URL]
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в PSMCM модули нужно вести правильные данные(переменные) которые должны предварительно ведены в Control Tags - Local:C, Local:O, Local:I, и MMC. MMC должно предварительно создается самим пользователем Namе -любое, Data Type - MCMModuleDef. Затем эти переменные водятся в блок PSMCM. В даташите на MVI56-MCM все подробно описано, может этот модуль отличается от вашего MVI56-MCMR
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Доброго дня всем!
Обращаюсь к специалистам по VBA for RSView32
Как избавиться от кавычек строковых данных при записи в файл:
[code:1:fd9ae78f2d]Sub Temp()
Dim Temp As Integer
Dim File As String
Dim MyFileName As String
MyFileName = gProject.Path & "\TXT\" & Strings.Format(DateTime.Date, "Long Date") & Strings.Format(DateTime.Time, "h") & Strings.Format(DateTime.Time, "m") & Strings.Format(DateTime.Time, "s") & ".txt"
File = FreeFile
Open MyFileName For Append As #File
Write #File, "", "", ""
Write #File, "aaa", "bbb", "ccc"
Write #File, "aaa"; "bbb"; "ccc"
Write #File, "aaa" + "bbb" + "ccc"
Write #File, 123, "bbb", 123
Write #File, 123; "bbb"; 123
Write #File, Strings.Format("ффф", "aaa")
Write #File, Strings.Format(123, "000")
Write #File,
Write #File, Strings.Format("ффф", ">")
Write #File, 234
Close #File
End Sub[/code:1:fd9ae78f2d]
В хелпе записано:
[quote:fd9ae78f2d]Unlike the Print # statement, the Write # statement inserts commas between items and quotation marks around strings as they are written to the file.[/quote:fd9ae78f2d]
Кто-то может нашел простое решение, не выходя за рамки VBA и не используя OLE?
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[quote:26848fd9c3="katod"]Я это понимаю, не учла в первичных записях, что подключаю комп-преобразователь 1761NET-AIC- и уже контроллер. В нем есть два разъема: один под кабель сетевой, второй под сам ML1500. Как дальше быть?[/quote:26848fd9c3]
1). [b:26848fd9c3]1761-CBL-HM02 [/b:26848fd9c3](обеспечивает питание [b:26848fd9c3]NET-AIC+[/b:26848fd9c3]) - позволяет подключить любой ML1500 к [b:26848fd9c3]NET-AIC+[/b:26848fd9c3], от [b:26848fd9c3]NET-AIC+[/b:26848fd9c3] нульмодемный кабель на RS-232 компьютера. Другой вариант подлючения через [b:26848fd9c3]NET-AIC+[/b:26848fd9c3] потребует внешний источник питания.
2) [b:26848fd9c3]1761-CBL-PM02 [/b:26848fd9c3]- позволяет подключить любой ML1500 к RS-232 компьютера
3) [b:26848fd9c3]1747-CP3[/b:26848fd9c3] (нульмодемный) позволяет подключить ML1500 (только [color=red:26848fd9c3]LRP[/color:26848fd9c3]) к RS-232 компьютера.
В [b:26848fd9c3]RSLinx[/b:26848fd9c3] выбрать [b:26848fd9c3]RS-232 Devices[/b:26848fd9c3].
Может быть придется нажать и держать кнопку на контроллере для сброса параметров порта.
Можно обеспечить связь если в контроллере включен [b:26848fd9c3]DH-485[/b:26848fd9c3], в этом случае в [b:26848fd9c3]RSLinx [/b:26848fd9c3]надо выбирать [b:26848fd9c3]1747-PIC/AIC+ Driver[/b:26848fd9c3].
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Начато изготовление страниц фото-видео-повести "Хубсугул-2009".
http://www.ar-video.xost.ru/Hubsugul_2009.htm
Выставлено оглавление и первая глава.
[img:27861b2b8a]http://www.arvideo.by.ru/TMB/HUBSUGUL2009/01_MONGOLIAN_STEPPE.jpg[/img:27861b2b8a]
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К автору темы: установка made in China. Интересная статья
http://www.designnews.com/blog/Made_by_Monkeys/23373-Chinese_Knockoffs_Move_Beyond_Gucci_Bags.php?nid=3073&rid=1037668
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В структуре конфигурации порта есть поле MCM.Port1.CmdErrPtr
Работает также, как MCM.P1Cmd[0].IntAddress в команде
С заданного адреса в массив ReadData записываются коды ошибок всех команд по-порядку.
Коды ошибок есть в руководстве, 0 - ошибок нет.
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Хочу отметить, что когда я включаю контроллер во всех модулях зеленый свет мигает-это понятно, а вот на модуле MVI56-MCMR горить красный свет. Если я должень ее сконфигурировать, то как? С помошью Prosoft Configuration Builder или RSLogix 5000? Я сам в замешательстве, никак не получаеться.
Я открываю программу RSLogix 5000, создаю новый проект, когда загружаю проект в контроллер на всех модулях горит зеленый свет, кроме MVI56-MCMR, на нем постоянно красный свет. :cry:
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