I ran into a tricky problem when using node-red-contrib-s7 to connect to a PLC

General
1

A PLC can have its data read when no password is set, but if a password is configured, the data cannot be read. However, I haven't been able to find where to input the password to establish a connection.

2

Can you share addresses that you are trying to read?

S7 node doesn't require password to read PLC.
What password are you talking about?

This is my project password setup:

image
image1678×661 82.6 KB

and I can read PLC data without any issues

3

With this password in place, the connection can be established, but data reading fails and errors occur. The errors stop when I remove the password, and everything works normally then.

99d11c77a1da64b682e4c9c79d612b2
99d11c77a1da64b682e4c9c79d612b21920×1080 390 KB

4

Which password? TIA has so many places to enter passwords.

Also please check: https://support.industry.siemens.com/forum/WW/en/posts/connecting-to-hmi-error-code-0x8104/270924