Larrytew (Hôte)
| | Доброго времени суток!
Попалась авария w213 на преобразователе FR-V540L-200K-NA. Подобные приборы ATV71HD22N4S337, CIMR-F7C41600, F1C460V30HM30 установленные на вентиляции работают исправно.
Инструкцию нашел через nigma по запросу "Ремонт частотного преобразователя Delta VFD007E11A" http://prom-electric.ru/articles/1/115/ . Был неисправен микропроцессор.
Пока! |
Michaelfrups (Hôte)
| | Вечер добрый!
Высветилась неисправность 76 на инверторе CFW110038T4ON1Z. Другие устройства ATS22D47S6, CIMRJ7AZ44P00, CIMR-F7Z20751B установленные на насосах функционируют.
Объяснение нашел через яндекс по запросу "Ремонт частотного преобразователя Altivar ATV71 atv71hu40m3" prom-electric.ru/articles/1/707/ . Сгорел стабилитрон.
Всего наилучшего! |
Deltapyyuup (Hôte)
| | Добрый день!
Загорелась error f012 на частотном преобразователе M810-03200080A. Другие устройства ATV71EXC5D90N4, CIMR-E7Z40901B, S1-007 установленные на двигателях в порядке.
Значение нашел через яндекс по запросу "Автоматизация насосной станции с применением частотного преобразователя" prom-electric.ru/articles/1/290/ . Был неисправен оптотранзистор.
Всем пока |
Deltairuaqa (Hôte)
| | Привет!
Возникает error f221 на частотном приводе M400-094002240E. Другие устройства ATV61ES5D90N4, CIMRE7Z20181A, VFD 002 установленные на двигателях работают.
Объяснение нашел через nigma по запросу "Ремонт частотного преобразователя Altivar ATV71 atv71pu75n4z" prom-electric.ru/articles/1/747/ . Неиcправен был модуль Fuji.
Всего доброго! |
Deltaqquubt (Hôte)
| | noise caused by magnetic coupling. In a twisted pair, each twist of the cable swaps the physical positions of the wires. Any noise that magnetically couples into one wire is canceled in the next twist by an equal, opposite noise in the other wire. If the twisting isn’t perfectly uniform, the canceling will be less than 100%, but the noise will be much reduced. The twisting is most effective in reducing magnetic coupling of low-frequency signals, such as 60-Hz power-line noise. For a similar reason, twisted pairs also reduce the electromagnetic radiation emitted by a pair. The magnetic field emanating from a circuit is proportional to the area between the conductors. Twisting the wires tightly reduces this area, and thus the size of the magnetic field and the amount of noise that couples into it. With cable containing two twisted pairs, you can use one pair for the RS-485 signals and the other for a ground connection. Connect both wires in the pair to ground. Selecting Cable IBM and the EIA have published specifications for cable types. The specifications help in obtaining cables of known quality. Each cable type has a defined characteristic impedance and maximum bit rate. The propagation velocity may be specified as well. Manufacturers also publish specifications for cables designed for use in data links. Many RS-485 links use 120Q cable, but cables with higher characteristic impedance can also work. IBM Type 1 cable contains shielded twisted pairs, is rated for use at up to 16 Mbps, and has a characteristic impedance of 150Q. Some cable intended for data, including the popular Category 5 and Category 6 network cables, use 100Q, unshielded twisted pairs. These cables are fine for 1-way or full-duplex RS-485 or RS-422 lines. RS-422 allows just one driver and often uses 100Q cable with a single 100Q termination. A 2-way, half-duplex RS-485 line would need two 100Q resistors in parallel, which brings the parallel 133 Chapter 7 combination to 50Q, less than TIA-485-A’s prom-electric.ru |
