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| Siemens Contrl Cabinet |
01
ISSUES ABOUT SIEMENS S7-200SMART PLC
Q: What is the sinking input configuration for Siemens S7-200 SMART PLC?
A: You can understand it as when the positive terminal of the current flows out, it is a sinking input configuration.
Q: How to resolve the issue of insufficient activation zone width for controlling stepper RPS on Siemens S7-200 SMART PLC?
A: The RPS active zone (the distance where the RPS input remains activated) must be greater than the distance required for decelerating from RP_FAST to RP_SLOW. If the distance is too short, an error will be generated by the motion axis.
In other words, the active zone is set smaller than the deceleration zone.
Q: What is the maximum number of high-speed pulse outputs supported by Siemens S7-200 SMART PLC ST40?
A: The ST40 supports up to 3 channels of 100HZ high-speed pulses.
Q: How to reset the power-on delay timer TON on Siemens S7-200 SMART PLC?
A: You can use a reset instruction to reset TON, or disabling the timer's enable input will also reset it.
Q: How to clear the PLC password on Siemens S7-200 SMART PLC?
A: If you know the password, you can choose to clear it directly.
Click on "PLC" in the menu, select "Clear", choose "All" and enter the password to successfully clear it. If you forget the password, you must use a memory card (Micro SD card with a capacity of 4G, 8G, or 16G). The following two methods are available:
Use a Micro SD card to restore the CPU to its factory default state.
Use a Micro SD card to transfer a password-free program to the CPU.
Q: How do I eliminate the flashing red light on unused channels of the analog module output in Siemens S7-200 SMART PLC?
A: First, check if you have configured the analog channels or selected the analog module model in the system block. If so, you can delete the configuration or short-circuit the unused channels.
Q: Can STEP 7-MicroWIN SMART programming software and TIA Portal V15 be installed on the same system?
A: Yes, they can be installed on both Windows 7 and Windows 10 systems.
Q: Does STEP 7-MicroWIN SMART programming software support Windows 8?
A: Yes, STEP 7-MicroWIN SMART programming software supports Windows 8.
Q: What should I do if the S7-200 SMART programming software displays an error message about not finding s7epaapi.dll?
A: You can download this file from the internet or copy it from another computer. Make sure to match the file's bit version with your system's (64-bit system for 64-bit dll, 32-bit system for 32-bit dll). Then, copy the s7epaapi.dll file to the C:\Windows\System32 directory. If your system is 64-bit, also copy the 32-bit dll file to the C:\Windows\SysWOW64 directory.
Q: How do I resolve the issue of "Specified access point not found" when connecting PLC with STEP 7 MicroWIN SP9?
A: Go to the Control Panel, find the "Set PC/PG Interface" option, and navigate to the "Application Access Points" section. Choose "Add/Delete" and add a Microwin access point.
Q: Why does the STEP 7 MicroWIN SP9 programming software display "Specified access point not found" when setting the PG/PC interface?
A: The solution is the same as the previous question. Go to the Control Panel, find the "Set PC/PG Interface" option, and in the "Application Access Points" section, choose "Add/Delete" to add a Microwin access point.
Q: Will there be a conflict if I install STEP 7 MicroWIN SP9 and TIA Portal V15.1 on the same system?
A: There will be no conflict if both are installed on a Windows 7 system. However, installing STEP 7 MicroWIN SP9 on a Windows 10 system is not possible due to incompatibility issues. TIA Portal V15.1 can be installed on both Windows 7 and Windows 10.
02
Other issues about Siemens
Q: How can I view data types in Siemens S7-300 PLC?
A: Open the SIMATIC Manager programming software on your desktop, navigate to the OB1 main program, then create or click on the desired instruction block. Press the F1 Help button on your keyboard to view detailed information and data types.
Q: How does a Siemens S7-1200 PLC receive strings sent from an upper-level PC? I can receive bytes using TRCV, but not strings. Why is this?
A: You can receive strings by defining the variable as a string type.
Q: What does the error message "Microsoft Message Queue is not installed" mean when installing WINCC 7.4?
A: Navigate to Control Panel > Programs > Turn Windows features on or off, select "Microsoft Message Queue (MSMQ) Server," and click OK to automatically install it.
Q: How do I set WinCC to automatically activate a project when Windows starts up?
A: In the Start Menu, go to SIMATIC > WINCC > Autostart, select the desired project, and it will automatically run upon computer startup.
Q: When communicating between S7-200 SMART and S7-1200 smart devices, after exporting the GSD file from TIA Portal and adding it to S7-200 SMART, the PROFINET wizard generates an error saying "The input data character length exceeds the allowed character length." How do I resolve this?
A: Before exporting the GSD file from TIA Portal, ensure that the PN interface parameters are selected to be allocated by the upper-level IO controller.
Q: How do I download configuration screens to the Siemens WinCC flexible SMART touch screen?
A: Check the local connection IP address of your computer. In the touch screen software, set the touch screen's IP address in the transfer settings. Ensure the IP addresses are on the same gateway (not necessarily the same address). Then, set the same IP address on the touch screen to download the configuration.
Q: How do I display negative values in WinCC flexible SMART IO fields?
A: In the input/output field, set the "Output Format" to "S99.99". By default, it's "999.999". Adding an "S" at the beginning allows for negative input. Also, change the variable data type to INT.
Q: How do I export FB blocks from Siemens TIA Portal V15 software and import them into another program?
A: There are two methods. The first is to drag and drop the blocks directly into the other program. The second is to use the Block Generate Source and Source Generate Block functions for import and export.
Q: Can WINCC 7.5 and TIA Portal be installed on the same system?
A: No, TIA Portal and classic WINCC cannot be installed on the same system. They must be installed separately, or you can use a virtual machine.
Q: STEP7 requires .NET 3.5. Please enable .NET 3.5 on this PC. What does this mean?
A: 1. This message indicates that your computer does not have the necessary component installed. Go to Control Panel > Programs > Programs and Features.
Select "Turn Windows features on or off."
In the dialog box, select the option ".NET Framework 3.5 (includes .NET 2.0 and 3.0)" and click OK. The system will search for the files, and if not found, it will download and install them automatically. After installation, your computer may restart.