The breakdown of PLC is diagnosed

Power source is indicated ([POWER]LED is indicated) when to PLC when basic and unit power supply, main unit apparently of the setting [POWER] LED indicator light will be bright. If power source closes but [POWER] LED indicator light is not bright, affirm power source wiring please. Additional, when if same power source has drive sensor,waiting, affirm please have do not have laden short circuit or pass electricity. Except afore-mentioned reasons, may be eyewinker of conductivity of the interfuse inside PLC or other and unusual situation, make the fuse fusing inside main unit, can pass right now change fuse will solve. 2.

Make mistake directive ([EPROR] LED twinkles) when program solecism (if forget the constant of set timer or tally,wait) , or when the content that interfuse of eyewinker of unusual noise, conductivity waits to arouse program memory consequently formerly changes, [EPROR] LED can twinkle, PLC is in STOP condition, at the same time output turns into entirely OFF. Below this kind of circumstance, should check an order wrong, the examination has without conductivity eyewinker interfuse and source of high strenth noise. When producing a mistake, 8009, 8060~8068 among them one of the value is written into D8004 of special data register, the content in assuming this writes D8004 is 8064, pass the content that examines D8064 to be able to know to give wrong code. With make mistake code makes mistake actually relative to what answer the wrong code watch that content refers to PLC to use manual. 3.

Make mistake directive ([EPROR] LED light is bright) as a result of eyewinker of conductivity of PLC in-house interfuse or the effect that suffer exterior and unusual noise, bring about CPU out of control or operation cycle to exceed 200ms, criterion WDT makes mistake, [EPROR] LED light is bright, PLC is in STOP, at the same time output turns into entirely OFF. Can undertake cutting off the power right now restoration, if PLC returns to normal, ask an examination to have the case that produces source and conductivity eyewinker interfuse without unusual noise. Additional, whether does the ground connection that examines PLC please accord with a requirement. If check out procedure appears [EPROR] the change that LED lamp bright → twinkles, undertake the program is checked please. If [EPROR] when LED still holds lamp bright position all the time, affirm whether program operation cycle grows too please (surveillant D8012 is knowable the greatest sweep time) . After if undertook,be being checked entirely, [EPROR] the lamp bright condition of LED still cannot remove, interior of PLC of Lv of take an examination produced some kind of breakdown, contact with the manufacturer please. 4.

No matter input directive inputs unit LED to the lamp shines or destroy, check input signal switch to whether be really please ON or OFF condition. If input the capacity of rated electric current of switch too big or because oil is invaded,wait for a reason, easy generation contact is undesirable. When the input switch and LED lamp shine when using resistor parallel connection, although input switch OFF but parallel circuits still guides, still can undertake an input to PLC. If use the input device such as smooth sensor, because glow ／ suffers smooth place to stick,bilge waits, cause sensitivity change, cannot enter completely likely " ON " condition. Inside shorter than PLC operation cycle time, cannot receive the input of ON and OFF. If be in on input terminal when adscititious and different voltage, meeting attaint inputs loop. 5.

No matter output directive outputs unit LED to the lamp shines or destroy, if load cannot undertake ON or OFF when, as a result of,basically be overload, laden short circuit or the impulse current with capacity laden sex, cause relay to output contact agglutinate, or contact interface is bad to bring about a contact undesirable. CNC Milling