Entry type: Product note Entry ID: 4342303, Entry date: 09/01/1997
CPU 315-2 - New Revision Level 02
Concerns the product with Catalog No.: 6ES7 315-2AF01-0AB0 CPU 315-2 DP, 48 kbyte, 0.3 ms/Kstatm. Revision level 02 of the CPU 315-2 eliminates the following problem: After power ON with battery backup the CPU would sporadically run in an endless loop (STOP LED is lit and RUN LED flashes) and would not enter RUN mode even after power OFF / power ON. To return the CPU to RUN, the battery had to be removed during power OFF and the power switched ON again. Once the CPU was in RUN, the battery could be returned (the diagnostics buffer of the CPU would then read "4550" and "F102"). Upgrading: Please note: Revision level 03 is now available for the above CPU. See SIMATIC S7 User Info No. 1997/03/008 for details or speak to your SIMATIC contact at your local Siemens office about an upgrade to revi- sion level 03. ---------------------------------
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