How to power on the s7 200 to detect whether it is good or bad

There are three steps in total: the first step is to check whether the indicator is normal after powering on;

The second step is to toggle the run stop button up and down to see if the program runs and the stop indicator switch is normal;

The third step is to open the programming software of S7-200, connect to the **line, and see if the empty program can be successful (note that the PLC switch should be dialed to the STOP position during the **program).

Use microwin to configure the system, after seeing whether the module is false and the system fault light is on, if not, the basic proof that the module is good, and then monitor the status of the module, use the short wire to short the common wire and each input point on the module terminal, see whether the address bit indicator light on the module is on, and at the same time monitor whether there is a signal in the software, so that you can detect whether the module input point is intact. I didn't understand the second banquet letter, input and output are not the same thing, it's best to send your system module configuration up, I can show you.

Isn't the switch pressed to be shorted next to the line? The principle is the same as that of the leather family, allowing the external 24V to enter the input point to trigger the internal photoelectric isolation switch.

Do all the terminal flashing OK;

You can be a simple program, as shown in the figure, 8 is the number of outputs. In this way, when there is an input signal, all the outputs will be output, when there is no input signal, all the outputs are not, do not give the signal first, let all the outputs not output, see if the output indicator light is on, use the multimeter to measure the output voltage, and then give the signal, and then see if the output indicator light is on, and use the multimeter to measure the output voltage. If it's all right, the output is normal.

Connect the PLC electric key calendar source first to see if the indicator light is green.

In the case of PLC power, find a communication line and put your program ** to PLCWhen all the settings are correct, the communication port may be broken.

There's a runner on it.

Take the programming cable to communicate with the PLC, it is good to be able to communicate, and it is dangerous to not communicate, but you must first conclude that your programming cable can communicate with other PLCs, and there is no problem with the settings.

The control range is OK, for example, 0 to 5V is 10 tons, then your 0 to 10V can be programmed into 20 tons, so that you can output the range from 0 to 5V.

On the module, DIP switch SW1--SW3 sets ON, ON, OFF.

Connect the first channel, input: unipolar 0-5V, corresponding to 0---32000. Channels that are not in use should be shorted.

Number of read voltages:

--mov_w ]

AIW0 [ IN Out ] When the voltage of VW0 is less, the output alarm:

vw0|--i |-23040

When the voltage is greater than that, the output alarm:

vw0|--i |-29440

...Corresponding to 27648, the maximum should be 32000 It's relatively simple to do

Your outer point is not closed. When it's closed, it's open.

There's nothing wrong with it, it's normal. Closure is done only once in one scan cycle. You can't see the trend chart scan time when you choose too much.