Siemens S7-200SMART PLC FAQ

Siemens S7-200SMART PLC Problems

Q: What is the leakage connection method of Siemens S7-200SMART PLC?

Answer: You can understand it this way: current flowing out of the positive electrode is leakage type.

Q: How to solve the problem of insufficient width of the stepper RPS activation area controlled by Siemens S7-200SMART PLC?

A: The RPS Active Zone (the distance that the RPS input remains active) must be greater than the distance required to decelerate from RP_FAST to RP_SLOW. If the distance is too short, the motion axis will generate an error.

Meaning: The effective area is set smaller than the deceleration area

Q: How many high-speed pulses does Siemens S7-200SMART PLC ST40 support at most?

A: ST40 supports up to 3 channels of 100HZ high-speed pulses

Question: How to reset the Siemens S7-200SMART PLC power-on delay TON timer?

Answer: You can use the reset instruction to reset TON, and the timer disconnect enable can also be reset.

Q: How to clear the PLC password of Siemens S7-200SMART PLC?

A: If you know the password, you can choose to clear it directly.

1. Click on PLC in the menu, select Clear, select All and enter the password, and the password will be cleared successfully. If you forget the password, you must use a memory card (the capacity of the Micro SD card is 4G, 8G, 16G), the following two methods can be used:

1. Use Micro SD card to restore CPU to factory default state

2. Use Micro SD card to transfer the CPU program without password

Question: How to eliminate the flashing red light on an unused channel of the Siemens S7-200SMART PLC analog module output?

Answer: First, have you configured the analog channel in the system block or selected the analog module model? If so, just delete it, or short-circuit the unused channel.

Q: Can STEP 7-MicroWIN SMART programming software and TIA Portal V15 be installed on the same system?

Answer: This is definitely possible, both WIN7 and WIN10 are compatible.

Q: Does STEP 7-MicroWIN SMART programming software support WIN8 system?

Answer: STEP 7-MicroWIN SMART programming software can support WIN8 system.

Q: What should I do if the S7-200SMART programming software fails to find s7epaapi.dll?

Answer: You can download this file from the Internet or copy it from someone else's computer. For Windows XP/WIN7/WIN10 systems (64-bit systems correspond to 64-bit dll files, and 32-bit systems correspond to 32-bit dll files), copy s7epaapi.dll to the C:WindowsSystem32 directory.

If your system is 64-bit, please copy the 32-bit dll file to the C:WindowsSysWOW64 directory.

Q: When STEP 7 MicroWIN SP9 connects to PLC, it prompts that the specified access point cannot be found. How to solve it?

Answer: Find the PC/PG interface settings in the control panel, then select Add or Delete in the application access point, and add a Microwin access point.

Q: Why does it display "The specified access point was not found" when setting the PG/PC interface in STEP 7 MicroWIN SP9 programming software?

Answer: Find the PC/PG interface settings in the control panel, then select Add or Delete in the application access point, and add a Microwin access point.

Q: Will there be a conflict if STEP 7 MicroWIN SP9 programming software is installed together with TIA Portal V15.1?

A: If you install it on a WIN7 system, there will be no conflict. If you install it on a WIN10 system, it will not work because STEP 7 MicroWIN SP9 cannot be installed on a WIN10 system. It is not compatible and not supported. TIA Portal V15.1 can be installed on both WIN7 and WIN10.

Siemens Other Questions

Q: How to view the data type of Siemens S7-300PLC?

Answer: Open the SIMATIC Manager programming software on the desktop, enter the OB1 main program, then create or click the instruction block you need and press the F1 help button on the keyboard to view detailed information and data types.

Question: How does Siemens S7-1200PLC receive strings sent from the host PC? It can receive bytes using TRCV, but it cannot receive strings. Why?

Answer: Just define the variable as a string and you can receive it.

Q: What does it mean when I install WINCC7.4 and it says that Microsoft Message Queue is not installed?

Answer: Control Panel - Programs - Open or close Windows features - Select "Microsoft Message QUeue (MSMQ) Server" and click OK to automatically install.

Q: How to set WinCC to automatically activate the project when Windows system starts

Answer: Select the corresponding item in the Start Menu - SIMATIC - WINCC - Autostart, and it will run automatically when you start the computer.

Q: S7-200 SMART and S7-1200 intelligent devices communicate. After exporting the GSD file from TIA Portal and adding it to S7-200 SMART, I configure the PROFINET wizard and it reports an error message after clicking Generate: "The length of the input data exceeds the allowed length." How do I solve this problem?

Answer: Before exporting the GSD file, you need to check that the parameters of the PN interface will be allocated by the upper IO controller.

Question: How to download the configuration screen of Siemens WinCC flexible SMART touch screen?

A: Check the local connection IP address of the computer, and then transfer and set the touch screen IP address in the touch screen software. Please note that the IP address must be in the same gateway as the local connection IP of the computer. Remember, it is in the same gateway, not the same address. Then, set and transfer the IP address on the touch screen to be consistent and you can download it.

Question: How do you display negative values ​​in a WinCC flexible SMART IO field?

A: Set the "Output Format" to S99.99 in the Input/Output field.

The default is 999.999. Adding an S in front means that you can enter a negative sign, and then change the variable to INT data type.

Question: How can I export the FB blocks in Siemens TIA Portal V15 software and then import them into another program?

A: There are two methods. The first is to drag directly to another one. The second is to use blocks to generate sources, and sources to generate blocks for import and export.

Q: Can WINCC7.5 be installed together with TIA Portal?

A: No, TIA Portal and WINCC Classic cannot be installed on the same system. They can only be installed separately. You can install a virtual machine

Q: STEP7 requires the use of .net3.5. Please enable .net3.5 on this PC. What does this mean?

Answer: 1. This happens because your computer does not have the necessary components installed. In the Control Panel, select "Remove Programs".

2. Then select "Turn Windows features on or off".

3. In the pop-up dialog box, select the option net 3.5 Framework (including net 2.0 and 3.0), then select "OK". The system will start searching for files. If it cannot find any files, it will help you download them online. After the installation is complete, it will automatically restart. That's it.

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I wonder if you understand the above question?