FX2n-32MT cpu problem

[sttchui]

Hi,

i have two machine using same Mitsubishi PLC FX2n-32MT Series. One of those machine is down now, so i upload the program from another machine to a new FX2n-32MT CPU & replace the broken one.

After i replace it with new CPU none of the machine function work as it should be. So i try replace the broken PLC with the other existing machine CPU & it work as it suppose too.

I can't really understand why the new CPU doesn't work but the old CPU is working perfectly??? i just ONLY remove the old CPU & everything from wiring to termination is excatly the same as previous setting.

i also can see the expansion Digital signal is working & the Analogue input & output. But still i can't make it working in the new CPU

Have anyone experience this kind of problem before??? any help will appricciated.

Thank you!

Regards,

sttchui

 

[Sergei Troizky]

Not only the program, but data memory also should be copied to the new PLC.
Also, ensure that the model suffix, if any, is the same (DSS or ESS).

 

[yuyangcr]

cheak the data registers of hold type ,if some of them are not eaque to zero then set the data to the new plc's data registers of hold type.