1511f-1pn wont turn on

If you have the original memory card available - the one that had the firmware that worked, what happens if you install that memory card into the PLC and power cycle it?  Is the switch turned to RUN?  Have you tried MRES and installing the correct firmware?

What have you tried?

Are you certain the correct firmware was installed?  Was the web interface used, or was it done using memory card?

Christ_t

Hi,

I have an 1511f-1pn that wont turn on when connected to the 24Vdc. After a Frimware Upgrade the plc wont turn on. I have tested the display on an other plc and this one worked. plc wont communicate when i connect the plc the my pc no lights blink anyone has a solution for this?

Have you measured the 24V / 0V at the power input to the PLC?  Is it possible the terminals have worked loose enough so at least one terminal is not making full electrical connection?  Or, a blown fuse / circuit breaker tripped upstream of the PLC?

If the s7-1511F-PN is installed externally to the system and powered up with known good 24V supply, does it power up?  Is the display fully engaged and closed?

Christ_t

Thanks for your reaction! I used a siemens sd card to create a frimware update card with tia portal V16 tried different frimware versions but doesnt work. I have tried MRES but doesnt make any differents plc wont blink any light or display 

Hi,

i have measured the fuse in the plc and this one is good powersupply is all good i think the frimware is tripped inside the plc do you know how to reset the frimware on the plc?