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Forum des MF24 - ACFC / FCTM

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bridgetio1 (Hôte)
03/04/2018 09 09 09 (UTC)[citer]
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Michaelsot (Hôte)
04/04/2018 20 08 03 (UTC)[citer]
Доброй ночи.
Появилась error w014 на инверторе EQ5-2125-C. Другие устройства ATV12HU15M3, CIMR-VCBA0006JAA, CIMR-E7U40451A установленные на вентиляции работают исправно.
Направление нашел через yandex по запросу "IGBT модули - замена, ремонт в Санкт-Петербурге." prom-electric.ru/articles/5/1341/ . Поменял mcu.
Всем успехов!
Deltabitupu (Hôte)
07/04/2018 11 11 21 (UTC)[citer]
Доброго времени суток!
Возникает неисправность f28 на приводе M600-10402700E. Другие устройства CIMR-E7C41P51, CIMR MR5N 2011, SMC920600-P на компрессорах исправны.
Направление нашел через яндекс по запросу "pmxb56en" prom-electric.ru/media/PMXB56EN.pdf . Вышел из строя процессор.
Всем успехов!
Deltawaayiw (Hôte)
07/04/2018 12 12 28 (UTC)[citer]
Приветствую Вас!
Высвечивается авария al236 на частотном приводе SJ300-185LFU. Другие устройства ATS48C25YS338, CIMRJ7ACB0P10, FR-E720-015SC-NA установленные на двигателях без неисправностей.
Методику нашел в гугле по запросу "ph955l" prom-electric.ru/media/PH955L.pdf . Неиcправен был клеммник.
Успехов!
Deltaraqrir (Hôte)
07/04/2018 13 01 29 (UTC)[citer]
about any type of cable of this length or less. Later versions of the standard instead specify a maximum capacitance of 2500 pF at the receiver. This value includes the capacitance of the receiver, the mutual capacitance between conductors in the cable, and the capacitance between the conductor and the cable shield or, on unshielded cable, between the conductor and earth ground. The capacitance has several effects. It limits the slew rate, with a larger capacitance resulting in a lower slew rate and slower transitions. A higher capacitance means that a voltage change requires more current to charge the capacitance, so the overall power consumption of the drivers is greater. Capacitance between wires can result in crosstalk, where the signal on one wire also shows up on adjacent wires. 67 Chapter 5 Unshielded Cable Cable manufacturers often specify the capacitance of their products in pF/ft. For unshielded cable, an appendix to TIA-232 recommends adding 50% to the cable’s capacitance to account for conductor-to-ground capacitance. The formula to calculate cable length for unshielded cable is: CableLength = 2500 - InputCapacitanceOfReceiver / CableCapacitance * 1.5 CableLength is in ft, InputCapacitanceOfReceiver is in pF, and CableCapaci-tance is in pF/ft. TIA-232 doesn’t recommend a cable type. Typical capacitance of ribbon cable is 15 pF/ft. Assuming that the receiver’s input is 100 pF, the cable can be as long as 106 feet 2500-100 / 15*1.5 . Typical capacitance for a single, unshielded twisted pair is 12pF/ft. Again assuming an input capacitance of 100 pF, maximum cable length is 133 feet. Twisted Pairs For reduced crosstalk, you can use twisted-pair cable with each pair containing a signal wire and a ground wire. Chapter 7 has more on twisted pairs. Shielded Cable Adding shielding to the cable shortens the maximum allowed length, but shielding can block noise from coupling into or out of the cable. For shielded twisted-pair cable, an appendix to TIA-232 re prom-electric.ru

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