on site3#Equipment313ccontrolACS800Inverter drive355KWMotor，and also6ra70Power supply，Power supply to a car BALMUDA电风扇维修 controller。The motor is high after starting，plcInstead of communication with the wind touch BALMUDA烤箱不工作 screen；MPICommunication abnormal communication，So I put313CGround land，Nothing。PutDPLine for one，Nothing。
On the same day4#Computer can't start，Take3#Computer moves to4#go with，The computer started，In4#The gantry cannot bePLCcommunication；CPThe card is also the same。So that it is bad4#ComputerCP5611Card pull down3#on the computer，in4#On the beach andPLCCommunicate。This may be the original3#CP5611Crazy，But should not affect3#PLCScreenMPICommunications？
3#The device changed a industrial computer，But backCPThe yellow light below the card keeps flashing，Others are all green lights.，Suspected is a industrial computer220VUnclear，Changed220V，Like this，But the screen is still a newsletter。It seems that there is no relationship with BALMUDA加湿器售后网点 the power supply.。
I found oneMMCCard change，Siemens technical support says that communication BALMUDA手冲壶售后网点 is not mainly interference and grounding2Aspect，I suggest I buy a male master conversion joint，Ask the communication protocol，useDPLine a communication line。
But the manager came over，Discover the enclosure of the car controller，Because of interference causes screens andPLCThe phenomenon of communication is rarely appeared.。
This problem is solved without the end，baffling。If the field power grounding and signal ground are separated，And each cabinet is close to ground，Don't you have anything?？