6/22/2023 8:18 AM | |
Joined: 2/17/2020 Last visit: 9/11/2024 Posts: 1056 Rating:
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Hi, Below you will be able to find some points and FAQs that I consider are useful when you encounter a PLC-HMI connection problem: - Is it a direct connection or does it go through some intermediate element, such as a router? - Has it been tested with other PN/DP cables? - Do the date and time configured in the PLC and HMI match? - Within the PLC properties (only for S7-1500 and S7-1200 with FW V4.5 or higher), is there any protection against HMI access with a password configured? If so, has this password been set in the "HMI connection" for the panel to access? - In the PLC tag table, do the tags that are shared with the HMI have the "Accessible from HMI/OPC" and "Writable from HMI/OPC" checks marked? - Check the configuration of the HMI connection (S7ONLINE, IP/DP addresses) - If both PLC and HMI are simulated, does the communication between them work? This would indicate that the connection configuration and other parameters are OK. - Backup + reset to factory settings of both devices in case there is any “stuck” connection resource. A reboot could also help in this case. Useful FAQs: No connection to PLC after WinCC Panel Images V17 Update 6 |
A rating will be well appreciated. |
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