Need help troubleshooting Delta HMI model DOP-103BQ communication issues with Delta Plc DVP-sx211t? Struggling to display or read data from PLC (such as counters, timers, data values, etc.) on your HMI? Despite being able to input data into the PLC, the HMI fails to read or display it? It appears that the HMI can only write data but not retrieve it from the PLC. Let us assist you in resolving this problem effectively. Thank you.
What is the connection between the two components? In a previous experience, I encountered a similar issue (although not on Delta hardware) where the devices were linked via a serial port cable that was incorrectly wired for the specific application.
Communication is established through the use of RS485 technology.
In order to communicate between two switchgears, such as a PID controller EPC 3216 CPRDR, you must utilize Eurotherm Modbus addresses and their corresponding holding registers. Communication is done through the RS 485 port of Eurotherm, with ports HE and HF, and the DB-9 port 1,6. Both controllers' TX and RX need to be shorted. If controlling the controllers independently, individual links must be created and specified in the configuration as 1 and 2, with the same addresses assigned. To control both controllers together, a macro script must be written in the background macro to link all registers accordingly.
This sounds like a typical issue with HMI-PLC communication. Usually, it's related to incorrect data block addressing or mismatched communication protocols. If you've already checked these parameters, you might want to look into the PLC's programming. Are you sure the PLC's written program allows the HMI to read its data? Also, Delta HMIs typically have a debugging mode that you can use to spot communication errors or data transfer issues. It could help identify the underlying problem. Keep us updated on your progress!
It sounds like a communication mismatch issue between your HMI and PLC. Have you checked the communication parameters—like baud rate, parity, and stop bit—in both PLC and HMI? They need to be identical for effective data transfer. Also, ensure you've correctly mapped HMI elements like buttons and displays to corresponding PLC addresses. Last, do consider referring to the DOPSoft manual to troubleshoot various scenarios—it's quite a handy guide.
I've encountered a similar issue in the past with my Delta HMI. Although it might sound a bit basic, have you thoroughly checked your Modbus communication settings? Often, many communication issues stem from incorrect addressing or a mismatch in speed, parity, data bits, or stop bits. Another thing to look at is the ladder logic in your PLC, especially if you're trying to read predefined memory addresses. Lastly, always make sure that your PLC and HMI are updated with the latest firmware. Hope this helps!
It sounds like a frustrating issue, but a couple of things come to mind that you might want to check. First, ensure that the communication settings (like baud rate, parity, and stop bits) match between the HMI and the PLC. Sometimes, it’s a simple misconfiguration. Also, verify that the memory addresses you’re trying to read from on the PLC are properly mapped in the HMI’s configuration, as well as checking read/write permissions. It might also help to look at your HMI’s documentation for any specific settings or limitations regarding data retrieval from the DVP-SX series. Let us know how it goes!
It sounds like you’ve got a tricky situation there! Have you double-checked the communication settings between the HMI and PLC, like the baud rate and protocol type? Sometimes these simple settings can cause a lot of confusion. Also, ensure that the memory addresses you’re trying to read from on the PLC are correctly configured in the HMI. If you’re using any special function codes or commands for data retrieval, make sure those are properly set as well. If everything looks good on the setup, consider updating the firmware on both devices—it can sometimes resolve hidden bugs. Hope this helps!
It sounds like you're facing a typical communication issue between the HMI and PLC. First, double-check the communication settings on both devices, like baud rate and protocol; they need to match perfectly. Also, ensure that the memory addresses you're trying to read from the PLC are correctly mapped in the HMI configuration. Sometimes, it helps to perform a test with simple data points just to ensure everything is communicating properly. If it's still not working, consider using a monitoring tool to see if the PLC is sending data correctly, which can help pinpoint where the breakdown is happening. Good luck!
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Answer: To troubleshoot communication issues between the Delta HMI and PLC, you can check the connection settings, communication protocols, cable connections, network configurations, and ensure compatibility between the devices.
Answer: This issue could be due to incorrect communication settings, mismatched data formats, or incompatible communication protocols between the HMI and PLC. Double-check the settings and configurations to ensure proper communication.
Answer: Make sure that the communication parameters (such as baud rate, data format, communication protocol) are correctly set up on both the HMI and PLC. Verify that the read/write permissions are configured correctly and that the data registers are mapped properly for communication.
Answer: Common troubleshooting steps include checking physical connections, verifying communication settings, ensuring proper power supply, confirming device compatibility, checking for software/firmware updates, and consulting the user manuals for both devices.
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