Siemens OP7 Problem


Thread Starter

Muddassar Mahmood

I have an OP7 module. Some days before, after power failure, the OP7 LCD is blank, i.e. no display only the LCD light (LED) is ON.

I tried several times to Reset the module by On/Off the module 24Vdc power but no results. Then I tried to re-program the OP7 by changing the Mode of OP7 in Transfer/Download Mode (using the producer in OP7 manual (Esc+Arrow Keys) and reset power, but the module is not going imto Transfer/Download Mode.

Please help me to diagnose the problem. Can anybody tell me that do all above symptoms show that module is having Hardware fault or any thing else?

Thanks & Best regards,