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Выпала авария f006 на частотном приводе M400-02200056A. Похожие устройства ATV71HD30M3X, CIMR MTII 15, VFD220VL43A установленные на насосах работают.
Описание нашел через гугл на сайте promelektrik http://prom-electric.ru/articles/1/1/ Сервисное обслуживание частотников в России. Неиcправен был микроконтроллер.
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Мигает авария 27 на преобразователе частоты SJ300-150LFU. Аналогичные устройства ATV61ES5C63N4, CIMR-F7A40750, CIMR-V7TC43P07 на компрессорах работают исправно.
Методику нашел через рамблер по запросу "Ремонт частотного преобразователя Altivar atv32hd11n4" prom-electric.ru/articles/1/423/ . Был неисправен черный позистор.
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Происходит авария w52 на приводе FR-A840-03250-1-60. Подобные приборы ATV71HD45N4Z, CIMRJ7AC20P40, EI-9011-015H установленные на двигателях без аварий.
Направление нашел через рамблер по запросу "psmn3r9-60ps" prom-electric.ru/media/PSMN3R9-60PS.pdf . Оказалось подгорел вентилятор охлаждения.
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Выпадает неисправность a138 на инверторе FR-Z024-0.4K-UL. Другие устройства ATV61E5U75N4, CIMR-J7AC20P70, EI-7011-025H установленные на вентиляции без ошибок.
Инструкцию нашел в яндексе по запросу "Ремонт частотного преобразователя Altivar 31 atv31hu22m2" prom-electric.ru/articles/1/1049/ . Заменил модуль семикрон.
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impedance at high frequencies, but the series resistance can become significant for other reasons when the wires are very long. The resistance of stranded AWG #24 wire is about 25Q/1000 ft. In a 4000-ft link, each wire has 1000 series resistance. If a physically long line has two 1200 termination resistors, a large part of the signal will drop across the wires, and the receiver will see a much smaller differential voltage. However, if the signals have the minimum 1.5 V difference at the driver, only a fraction of the signal needs to make it to the receiver to enable detecting the minimum required 0.2V difference. To decrease the series resistance, use wire with a lower AWG value and thus a larger diameter . Negative Effects of Parallel Terminations Adding a termination is a trade off. Besides reducing reflections, terminating an RS-485 line has negative effects, including increased power consumption, lower noise margin, and overriding the receiver’s internal fail-safe circuits. The higher power consumption is a result of the line’s lower series resistance. In Figure 7-6, circuits A and B show how adding a 1200 terminating resistor decreases the parallel input impedance from 12k to 1190- Assuming 300 output impedance for each driver, the current on the line increases from 0.4 to 28 mA. The higher current also reduces the noise margin. The driver’s output impedance absorbs a larger proportion of the output voltage, reducing the differential voltage at the receivers. If the output impedance of each driver is 300- one third of the voltage drops across the drivers’ output impedances, leaving only 3.3 V across the termination. The received differential signal is still 3.1V greater than the receiver’s input threshold, however. Adding a second termination resistor exaggerates both of these effects. One way to conserve power is to disable a driver when it isn’t transmitting. If the communications path is often idle, disabling drivers that aren’t transmitting 120 Designing R prom-electric.ru