User’s Manual LG Programmable Logic Controller - Chapter 10 & 11

Chapter 10 Maintenance Hãy chắc chắn để thực hiện bảo trì hàng ngày và định kỳ và kiểm tra để duy trì PLC trong điều kiện tốt nhất. Bảo trì và giám định Các module I / O chủ yếu bao gồm các thiết bị bán dẫn và phục vụ đời sống của nó là bán kiên cố. Tuy nhiên, kiểm tra định kỳ là yêu cầu đối với môi trường xung quanh có thể gây ra thiệt hại cho các thiết bị. | Chapter 10 Maintenance Chapter 10 Maintenance Be sure to perform daily and periodic maintenance and inspection in order to maintain the PLC in the best conditions. Maintenance and I nspection__ The I O module mainly consist of semiconductor devices and its service life is semi-permanent. However periodic inspection is requested for ambient environment may cause damage to the devices. When inspecting one or two times per six months check the following items. Check Items Judgment Corrective Actions Ambient environment Temperature 0 55 C Adjust the operating temperature and humidity with the defined range. Humidity 5 95 RH Vibration No vibration Use vibration resisting rubber or the vibration prevention method. Play of modules No play allowed Securely enrage the hook. Connecting conditions of terminal screws No loose allowed Retighten terminal screws. Change rate of input voltage - 15 to 10 Hold it with the allowable range. Spare parts Check the number of Spare parts and their Store conditions Cover the shortage and improve the conditions Daily I nspection The following table shows the inspection and items which are to be checked daily. Check Items Check Points Judgement Corrective Actions Connecting conditions of terminal block or extension cable check for loose mounting screws Screws should not be loose Retighten Screws Check the distance between solderless terminals Proper clearance should be provided Correct Indicating LED PWR LED Check that the LED is ON ON OFF indicates an error See chapter 11 Run LED Check that the LED is ON during Run ON flickering indicates an error See chapter 11 ERR LED Check that the LED is OFF during Run OFF ON indicates an error See chapter 11 Input LED Check that the LEO turns ON and OFF ON when input is ON OFF when input is off See chapter 11 Output LED Check that the LEO turns ON and OFF ON when output is ON OFF when output is off See chapter 11 10-1 Chapter 10 Maintenance Periodic I .