3/31/2015 8:21 PM | |
Joined: 9/27/2006 Last visit: 9/18/2024 Posts: 12282 Rating: (2684) |
Hello tranx; Maybe the following thread can refresh your memory: SIMATIC S7-300 - installation of analog I/O modules The picture you show selected the coding keys that siemens places in every IO module, in the area where the front connector will be inserted. each type of module (DI, DO, AI, AO, FM...) has a distinct placement of the coding keys. You do not have to set anything: the fist time a front connector is placed in the module, the coding keys attach to the backside of the connector, and the connector can no longer be inserted in any other type of module. This is a protection in case of removal of the front connector (during commissioning, for example), to limit the number of wiring mistakes that can happen if you insert the wrong type of front connector (eg the front connector od an AI on a DI module of the same size). Hope this helps, Daniel Chartier. |
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