The communication between the PLC and the STEP7 software has timed out

There should be no problem with the device, mainly on the communication settings. For example, if you only have one communication port, and you set the port as a free communication protocol, it will naturally fail to communicate in the running state, and you can only use the PPI protocol in the stopped state, and the free port communication protocol is blocked at this time.

Here's how the communication went:

2. You can test the quality of the input and output points of the digital module, such as writing a simple program, the input point is turned on, there is a signal, and the corresponding I** The light should be on, at this time it can also be detected from the program, and the same method is used to detect the output point, when there is a signal output, the light is on.

If there is no communication timeout, you can debug the parameters repeatedly or restart the PLC

Check the settings of the communication parameters of your Step 7-Microwin software.

If the setting is correct, whether it is in the state of stopping or running, it can be linked to the PLC, if it can only be connected in the stop state of the PLC, it may be a problem with the communication protocol, because the PLC is in the stop state, the communication protocol can only be the PPI protocol, but in the case of the running state, it can be set by software.

Set the PG PC interface in the software, select PC PPI Cable (PPI) www

The hardware interface and connection cable are not connected or faulty.

To put it bluntly, it just didn't connect.

Two ways to try one is to update the CP5611 driver, it may be a driver problem, you can also check whether the CP5611 hardware is normal in the computer hardware, such as Kuankuanguo is "the device is Shen Sun Liang is normal", it may be the second situation, the second is that there is a problem with the CP5611 communication card, although it rarely happens but there is such a situation, you can replace it if you have the conditions.

Or later Shanbu is actually with cp5611 drivers, of course, the two versions may be different, and the supported motherboard types are not the same, which may cause you to have this quiet problem (pure guessing) You can try: find a disc and don't install it, find that cp5611 in the computer properties, select the update driver, point to the cd, and automatically find it. Install the driver alone, try it, tell me to verify it, if it's okay.

Check whether the hardware configuration is correct, check whether the communication com port is selected correctly, check whether the communication address and communication baud rate are set correctly...

Generally, the communication rate is set incorrectly, you can take a look.

1. Make sure the PLC is powered on.

2. Ensure that the PLC type is correct.

3. Confirm whether the driver of the line is installed.

This is a problem with the version, the programming software version is too low, and it is not included to change the PLC model, so update the firmware version.

When the PLC hits the STOP mode, sometimes the communication will occupy the port.

Maybe you didn't set it up when you first set up the hardware configuration or networking, or there is a problem with the driver or setting you selected in WinCC.

It may be because the profibus line is too long and there is interference, try to change the baud rate to 500kbps in the hardware configuration in step7.

There is a distortion in your understanding, s7

Microwin is used to write PLC programs, which belongs to the lower computer software, and a software can only write one or several similar models of PLC;

The configuration software is used to code and write the human-machine interface, which belongs to the upper computer software, and is compatible with most brands and models of PLC;

They are not a category, the configuration software of Simon Zhixuzi is called WinCC, and the Siemens PLC programming software is called Step7

The method of communication between Siemens 300PLC and STEP7 software through the switch is to set the IP address of the computer and the IP address of the PLC, at least the first two digits are set to the same **, and the communication can be carried out through the IP node.

After receiving the data transmission command, any node of the switch quickly looks up the address table stored in memory, confirms the NIC connection location of the MAC address, and then transmits data to the node.

If the corresponding location is found in the address table, the transmission takes place; If not, the switch will record the address for the next time you find and use it.

The second floor is correct.

That's it! .The MAC address is not required, and it can be accessed through the IP node!

Since you choose Ethernet, you must first define the IP addresses of both parties if you want to establish communication, you only define the IP of the PLC now, the IP of the host computer has not been defined, and the communication can be established after the network neighbor - local connection - right-click attribute to change the computer IP, and the PLC constitutes a local area network.