7/8/2023 1:07 PM | |
Joined: 9/27/2006 Last visit: 9/27/2024 Posts: 12283 Rating: (2685)
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Hello Vvicken; The round knobs you are illustrating in your screenshot are known as the encoding pins of the analog module, part of the front connector you will use to wire up any S7-300 module. Consider them as a mechanical protection against certain types of wiring errors. The encoding pin come from the factory built-in the back of the front connectors, and when you click-in the front connector for the first time they are transfered to the main module body. When you remove the front connector, for maintenance or wiing changes, they remain on the main module body, as you have shown. Normally they should not be used to identify individual modules, but simply make sure that where a front connector for an analog input module (for example) has been wired, you cannot inadvertently replace it by the front connector of a digital input module, which could lead to the destruction of the module contacts. The encoding pins have been described in better detail in this thread: https://support.industry.siemens.com/forum/ca/en/posts/mechanical-coding-philosophy/271734 It would seem that the previous user of the front connector has used it on a different type of module.In your case, it is simple to remove the offending encoding pins, delicately, using a pair of lomg-nose pliers, and re-insert them in the position of the original pins you have in your first module. That should resolve that issue. Tell us if this change allows you to use your new module without proble. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 07/09/2023 18:37:33 |
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