HONEYWELL DCS 51201602-100

类目：HONEYWELL霍尼韦尔
型号：HONEYWELL DCS 51201602-100
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(2) The zero line row of the primary system power transformer was stopped due to corrosion, resulting in the plc220v power supply rising to 380V, which burned the power module at the bottom of the PLC, and the 380 / 220V isolation control transformer was added during the rectification.
(3) PLC output common terminal label 1L, 2L, etc., operation computer for acl1n indicates, + 24 V power supply for L + m indicates simple mistake for beginners or inexperienced. If l + m is taken as the 220 V power supply terminal by mistake, the plc24 V power supply will be burnt out in the moment of power transmission.
(4) According to the author's long experience, the probability of PLC, CPU and other hardware damage or software operation error is almost zero. If the PLC input point is not caused by the invasion of strong current, it will not be damaged. If the normally open point of PLC output relay is not the external load short circuit or unreasonable design, the load current exceeds the extra range, and the contact life is also very long. Therefore, we find the electrical fault point, the key point should be placed on the PLC peripheral electrical components, do not always doubt the PLC hardware or program, which is very important for the rapid repair of defective equipment, rapid recovery of production, so the author talked about the PLC control circuit electrical fault maintenance, the key point is not in the PLC itself, but the PLC control circuit in the peripheral electrical components.