Experiencing an "Invalid value for the port ID" error when using the MB_MASTER function in Siemens TIA V19? After creating and uploading a device to your PC, setting up the MB_MASTER and MB_COMM in Main [OB1], you may still encounter this issue. The Simatic S7-1200 CPU 1212C DC/DC/Rly with a CB 1241 (RS485) appears to be involved in the problem. Despite the PLC indicating the port, the error persists. If you're puzzled by this error, read on for possible solutions.
If you're seeking a reliable solution for integrating Modbus data into your project, consider trying out the Integration Objects OPC Server for Modbus. This specialized server is designed to efficiently read and present Modbus data through an OPC server, streamlining communication and configuration processes. To learn more and explore this integration tool, visit the Integration Objects OPC Server for Modbus. It could be the perfect solution you've been searching for.
k_w recommended trying out the Integration Objects OPC Server for Modbus to enhance data collection and integration in your project. This specialized tool enables seamless communication with Modbus devices and streamlines data presentation through an OPC server. By utilizing this tool, you can streamline Modbus communication and configuration within your project. If you're seeking effective integration solutions, consider exploring the capabilities of the Integration Objects OPC Server for Modbus. In my testing, I have experimented with the "Modbus Special Utility" and OPC, with successful communication between my PC and Modbus devices. However, I have encountered issues with PLC communication through the module to the Modbus setup.
Do you know where to find information on whether 8180 is considered an invalid port ID? In my research, I have come across conflicting information.
L DAR2P 0.0 questioned the validity of port id 8180. Upon researching within TIA inform system, it seems there may be confusion between the old v14 RTU and the default MODBUS protocol. Is this the correct approach? I have been advised to use MODBUS in online resources and videos. See the image of the main screen below for reference. Additionally, a screenshot of the real-time error is provided.
I was researching RTU when I came across misleading information.
I had a similar issue a while ago and here's how I resolved it. The "Invalid value for the port ID" error typically refers to an incorrect or unsupported ID for a COM port. First off, make sure you are using the appropriate port, as defined in the SIMATIC S7-1200 manual. If this doesn't fix it, the issue might be related to the port configuration. Review the settings and ensure your baud rate, parity, and stop bits match between the PLC and the device you're trying to communicate with. Also, double-check the Modbus TCP/IP settings in your MB_MASTER function blocks. An incorrect IP/port assignment could definitely trigger this error.
I've encountered this "Invalid value for the port ID" error before. It confused me for quite a while until I realized that the CB_1241 (RS485) uses Port 2 (i.e. Port ID is 2) by default and it caught me off guard because I was assuming the Port ID to be 1. Once you're aware of that and set up accordingly, the error should be resolved. However, for trial and error, you may also consider using GET_PORT to return the ID of the active port; this might help identify any discrepancies in your original configuration.
I've come across this issue before, and I believe the problem might be related to the board rate settings. If your board rate settings don't match between the CPU and the Comm Module (CB 1241), it leads to a communication error. Check that the Board rate, Data bits, Parity and Stop bits all match on both ends. You could also try a cold restart of your PLC after making these adjustments, as it can sometimes clear these kinds of errors.
I ran into the "Invalid value for the port ID" error too while working with the MB_MASTER function, and it drove me nuts for a while! One thing that helped was double-checking my hardware configuration in TIA Portal and ensuring that the CB 1241 was properly set up in the project settings—sometimes it’s just a matter of a missed configuration step. Additionally, I found that making sure the communication parameters align perfectly with the connected device can make a huge difference. Have you confirmed those settings? Let me know if you need more help!
I've faced the "Invalid value for the port ID" issue before, and it can be so frustrating! One common solution that worked for me was to double-check the port settings in your MB_MASTER block to ensure they match the configuration of your CB 1241. Also, confirm that the communication parameters, like baud rate and data bits, are identical on both your PLC and the device you're trying to communicate with. Sometimes just a small oversight can throw everything off! Additionally, make sure you're using the correct version of the libraries for TIA Portal. If the problem continues, it might be worth looking into any recent updates or firmware versions for your hardware.
✅ Work Order Management
✅ Asset Tracking
✅ Preventive Maintenance
✅ Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: Answer: The "Invalid value for the port ID" error typically occurs when using the MB_MASTER function in Siemens TIA V19 and may involve the Simatic S7-1200 CPU 1212C DC/DC/Rly with a CB 1241 (RS485) module.
Answer: Answer: To troubleshoot the Modbus Error 8180, ensure that you have correctly set up the MB_MASTER and MB_COMM functions in the Main [OB1] of your program. Additionally, verify the configuration of the device uploaded to your PC and the port settings on the PLC.
Answer: Answer: The error may persist due to incorrect configuration settings or parameters related to the port ID, communication setup, or device configuration. It is essential to review these settings and ensure they align with the requirements of the Modbus communication protocol.
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.