【正文】 speed of 12Mbps is allowed through the USB. [LOADING AND INSTALLATION] The precautions on the wiring ! DANGER . Completely turn off the external power supply when installing or placing wiring. Not pletely turning off all power could result in electric shock or damage to the product. . When turning on the power supply or operating the module after installation or wiring work, be sure that the module39。s rated voltage and the terminal layout. Connecting a power supply that is different from the rating or incorrectly wiring the product could result in fire or damage. TROUBLESHOOTING When a module fails, you can change it without stopping the system. Online module change applies to the Q series I/O modules and to the A/D converter, D/A 西安石油大學(xué)本科畢業(yè)設(shè)計(jì) （論文） converter, thermocouple input and temperature control modules of function version C and later. In order to increase the reliability of the system, not only highly reliable devices are used but also the speedy startup of the system after the occurrence of trouble bees an important start up the system speedily, the cause of the trouble must be located and eliminated correctly. The basic three points that must be followed in the troubleshooting are as follows. (1) Visual inspection Visually check the following. 1) Movement of sequencer (stopped condition, operating condition) 2) Power supply on/off 3) Status of input/output devices 4) Power supply module, CPU module,I/Omodule,intelligent function module,installation condition of extension cable 5) Status of wiring(I/O cables,cables) 6) Display status of various types of indicators (POWER LED, RUN LED,ERR. LED, I/O LED) 7) Status of setting of various types of set switches (Setting of No. of stages of extension base unit,power interrupt holdon status).After confirming items 1)to 7),connect the GX Developer, and check the operating conditions of the PLC and the contents of the program. (2) Check of trouble Check to see how the operating condition of the PLC varies while the PLC is operated as follows. 1) Set the RUN/STOP switch to STOP. 2) Reset the trouble with the RESET/ switch. 3) Turn ON and OFF the power supply. (3) Reduction in area Estimate the troubled part in accordance with items (1) and (2) above. 1) PLC or external devices 2) I/O module or others 3) Sequence program The CPU module returns an error code to the general data processing request origin when an error occurs and there is a general data processing request form the peripheral equipment,intelligent function module, or work system. If an error occurs,when a 西安石油大學(xué)本科畢業(yè)設(shè)計(jì) （論文） general data processing is requested from the peripheral devices, intelligent function module,and work system. [POWER SUPPLY MODULE] POINTS 1 Overcurrent protection The overcurrent protection device shuts off the 5 V, 24 VDC circuit and stops the system if the current flowing in the circuit exceeds the specified value. The LED of the power supply module is unlit or lit dimly upon a voltage drop. If this device is activated, switch the input power supply off and eliminate the cause such as insufficient current capacity or short. Then, a few minutes later, switch it on to restart the system. The initial start for the system takes place when the current value bees normal. 2 Overvoltage protection The overvoltage protection device shuts off the 5 VDC circuit and stops the system if a voltage of to VDC is applied to the circuit. When this device is activated, the power supply module LED is switched OFF. If this happens, switch the input power OFF, then a few minutes later ON. This causes the initial start for the system to take power supply module must be changed if the system is not booted and the LED remains OFF. 3 Permissible instantaneous power failure time (1) For AC input power supply . An instantaneous power failure lasting less than 20ms will cause AC down to be detected, but operation will continue. . An instantaneous power failure lasting more than 20ms may cause the operation to continue or initial start to take place depending on the power supply load. Furthermore,by using the same AC power supply for the AC input module and the power supply module,it is possible to prevent the sensor, to which the AC input module is connected,from turning OFF when it is ON when the power is turned OFF. However, if only the AC input module is connected to the AC line, which is connected to the power suppludetection of the AC down for the power supply module may be delayed by the capacitor in the AC input module. Thus,connect a load of approx. 30mA per QX10 unit to the AC line. (2) For DC input power supply . An instantaneous power failure lasting less than 10ms (*4) will cause 24VDC down to be detected, but operation will continue. . An instantaneous power failure lasting more than 10ms (*4) may cause the 西安石油大學(xué)本科畢業(yè)設(shè)計(jì) （論文） operation to continue or initial start to take place depending on the power supply load. (1: This is for a 24VDC input. This is 10ms or less for 24VDC or less.) [EMC AND LOW VOLTAGE DIRECTIVE] The PLC is open equipment and must be installed within a control cabi for not only ensures safety but also ensures effective shielding of PLCgenerated electromagic noise. (1) Control cabi (a) Use a conductive control cabi. (b) When attaching the control cabi39。 西安石油大學(xué)本科畢業(yè)設(shè)計(jì) （論文） 三菱通用可編程邏輯控制器的設(shè)計(jì)和制造的應(yīng)用 ，在一般性行業(yè)，等等。 （ a）連接到 10BASE5接口的 AUI電纜，一定要接地。也可以使用如下所示的夾具。但是，在電源線上安裝了噪聲濾波器時(shí)，可以不需要和接地線絞接。 另外，只要控制箱門和控制箱本體之間有間隙，就會(huì)有電波泄漏，因此，盡可能做到無(wú)間隙。 （ *1 當(dāng)直流 24V輸入時(shí)如小于直流 24V 此值也小于 10ms） [EMC指令低電壓指令 ] 控制箱內(nèi)的設(shè)置 PLC裝置是開(kāi)放型設(shè)備（可以組裝進(jìn)其他裝置的設(shè)備），一定要裝配在控制箱內(nèi)使用。如本裝置發(fā)生作用則關(guān)閉輸入電源在排除了電流容量不足短路等原因后，經(jīng)幾分鐘后再打開(kāi)電源啟動(dòng)系統(tǒng)。 （ 2） 檢查問(wèn)題 請(qǐng)檢查如何操作條件的不同，而可編程控制器 PLC 的是操作如下。不重視終端覆蓋可能導(dǎo)致觸電。 （ 6） 兼容性與過(guò)程控制專用軟件包 使用 PX的開(kāi)發(fā)是允許 PID控制方案的，以創(chuàng)造簡(jiǎn)單的功能塊。該進(jìn)程的 CPU 是一個(gè)控制