Changes for page 08 Troubleshooting

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21	21	The input and output of PLC is the main function of use, and I/O point problems are often caused by improper use or process\individual device problems; Including how the customer uses it, whether the mount is in compliance, etc. are all causes that lead to I/O failures .
22	22
23	23	(% class="table-bordered" %)
24		-|**Number**|**Failure**|**Troubleshooting**|**Solution**
25		-|1|(((
	24	+|**Number**|(% style="width:124px" %)**Failure**|(% style="width:747px" %)**Troubleshooting**|**Solution**
	25	+|1|(% style="width:124px" %)(((
26	26	X point failure
27		-)))|1. Use PLC software to detect X points that cannot be lit;
	27	+)))|(% style="width:747px" %)1. Use PLC software to detect X points that cannot be lit;
28	28	2. Connect PLC S/S to 24V, change multimeter to 20mA gear. The red test lead is on the X point of the fault, and the black test lead is on a Y point (the COMx corresponding to Y is connected to the COM terminal of the 24V voltage);
29	29	3.Use PLC software to control the on-off of the Y point(connected in step2) to check whether there is current on the multimeter. The high-speed input current is about 6.8mA, and the low-speed input current is about 4.7mA.|If no voltage is detected, the motherboard needs to be replaced for confirmation.
30		-|2|Y point failure|1. All COMx of PLC are connected to COM;
	30	+|2|(% style="width:124px" %)Y point failure|(% style="width:747px" %)1. All COMx of PLC are connected to COM;
31	31	2. Power on the PLC, use the buzzer of the multimeter, pen one test lead on COM, and the other on the Y that needs to be detected, and observe whether the buzzer sounds when the lamp board Y is not lit. ;|The normal situation is that the buzzer will beep when Y is turned on, and there will be no buzzer when it is turned off, or the Y point needs to be replaced.
32	32
33	33	= **3. Communication failure** =