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All Unity-based Modicon Premium CPUs sold before February 2005 have a potential issue with updating the Run-Stop input properly.  An OS/exec firmware download is mandatory,with the version SV2.02 or higher.

This Product Safety Notice covers Unity-based Modicon Premium CPUs installed on site, products in stock and spare parts. 

This Notice does not involve Unity-based Modicon Premium processors that were released for sale in or after March 2005. These products were updated prior to sale.

Modicon Premium - Firmware SV2.02 - Published March 9, 2005
Resolution Repository - Click here to check periodically for new content!

Part Number Documentation Firmware Exec
TSXP57CA0244M Read Me tsx_p57_cX024m.bin
TSXP57CD0244M " tsx_p57_cX024m.bin
TSXP570244M " tsx_p57_024m.bin
TSXP57104M " tsx_p57_104m.bin
TSXP57154M " tsx_p57_154m.bin
TSXP571634M " tsx_p57_1634m.bin
TSXP57204M " tsx_p57_204m.bin
TSXP57254M " -
TSXP572634M " tsx_p57_2634m.bin
TSXP57304M " tsx_p57_304m.bin
TSXP57354M " tsx_p57_354m.bin
TSXP573634M " tsx_p57_3634m.bin
TSXP57454M " tsx_p57_454m.bin
TSXP574634M " tsx_p57_4634m.bin
TSXP57554M " tsx_p57_554m.bin
TSXP575634M " tsx_p57_5634m.bin
TSXPCI57204M " -
TSXPCI57354M " -
OS Loader PV2 to PV2.0.n+1* OS Loader.zip

* File describes the different steps and screens of the OS Loader software.