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Выходит авария err20 на приводе FR-A540-45K-NA. Аналогичные приборы ATV71HU75N4S337, CIMRG7C20450B, FR-E720-030-NA на насосах работают исправно.
Решение нашел через гугл по запросу "buk963r3-60e" prom-electric.ru/media/BUK963R3-60E.pdf . Оказался неисправен ключевой транзистор.
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Появилась неисправность w06 на частотном приводе FR-F520-30K-NA. Подобные приборы ATS22D32S6U, CIMR-G7C20450B, IMS20202-V5-C24-F1-E4 на вентиляции без неисправностей.
Подсказку нашел через google по запросу "psmn1r0-30yld" prom-electric.ru/media/PSMN1R0-30YLD.pdf . Был неисправен транзисторный ключ.
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Выпала неисправность w143 на частотнике FR-A241E-7.5K-UL. Аналогичные приборы ATV312HU22N4B, CIMR-F7Z40300, CIMR-V7TC27P51 установленные на экструдерах в порядке.
Решение нашел через nigma по запросу "Siemens ошибки преобразователей частоты - расшифровка кодов неисправностей" prom-electric.ru/articles/7/1362/ . Был неисправен термистор.
Успехов!

tripling the value of the conductor-to-conductor capacitance to account for the conductor-to-shield capacitance. This is the formula to calculate cable length for shielded cable: CableLength = 2500 - InputCapacitanceOfReceiver / CableCapacitance * 3 CableLength is in ft, InputCapacitanceOfReceiver is in pF, and CableCapacitance is in pF/ft. The maximum length of shielded, twisted-pair cable is thus around 66 feet. If you want to use a cable that exceeds the capacitance limit, you’ll probably still be able to communicate, though at lower bit rates. Over short cables with correspondingly lower capacitance, you should be able to communicate faster than 20 kbps if the transmitting and receiving hardware supports higher rates. 68 Designing RS-232 Links MAX232A RS-232 I N 330 P6KEI3CA Figure 5-6: A TVS diode can protect components from high voltages on the RS-232 line. Surge Protection A way to protect circuits from noise or damaging voltages and currents is to use surge protection. The ideal surge protection absorbs all voltages and currents outside the circuits’ operating range while not limiting transmissions of valid signals in any way. In real life, a variety of devices can protect a link from many disasters due to voltage surges, though all add some capacitance to the link and thus limit the maximum bit rate and cable length. In normal operation, a protection device presents a high impedance and is virtually invisible to the transmitting circuits. When the line sees a high-voltage surge, the protection device switches on and provides a low-impedance path to ground. Two surge-suppression devices used in RS-232 lines are transient voltage suppression TVS diodes and gas-discharge tubes. TVS diodes are bidirectional zener diodes that have low capacitance when off, respond quickly 1 ps , and are available in many breakdown-voltage ranges. Gas-discharge tubes are slower but can protect against higher voltages. Some circuits use both. One terminal of the suppression prom-electric.ru

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Выпала ошибка a196 на преобразователе PA7300-4100-N1. Аналогичные приборы ATV71LD27N4Z, 3G3PV-B4220, S101001-41 установленные на насосах работают исправно.
Подсказку нашел в яндексе по запросу "SKiiP26NAB066V1" prom-electric.ru/media/SEMIKRON_DataSheet_SKiiP_26NAB066V1_25230630.pdf . Неиcправен был mosfet.
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