hinddhindsa
Member
HI.Friends in my Simatic S7-200 CN CPU224CN Relay output Siemens PLC which is installed in a TOWER CRANE,output1 is not working,but all other outputs and inputs are working well.
Simatic S7-200 Siemens one output not working
- Thread starter hinddhindsa
- Start date
hinddhindsa
Member
OP
What can be the possible hardware faults.PLC is in RUN state,i am not able to take back up because it is password protected.Is their anyway to Hack that Password.? Please help.
hinddhindsa
Member
OP
I had already changed the Output 1 and output 2 relays.
uptown47
Lifetime Supporting Member
Are you sure Output 1 is being told to come on? That it's not a faulty sensor somewhere that's stopping the logic being complete to bring on the output?
hinddhindsa
Member
OP
yes that is customer's complaint that Q1 is not working.Program is password protected to i am not able to see the ladder logic.
hinddhindsa
Member
OP
mainly replays gets faulty in PLCs, so already i had replaced the respective relay of Q1 output. still the problem is not fully solved.
geniusintraining
Lifetime Supporting Member + Moderator
hinddhindsa said:
If you don't know the password how did you change Output 1 to Output 2?
hinddhindsa
Member
OP
sir,i said i had replaced the relays of output 1 and output 2 with New relays in PLC hardware.I did not do anything in program until now.
uptown47
Lifetime Supporting Member
As far as I'm aware there is no way of 'hacking' the password. I know that you can clear the PLC (in other words set it back to factory settings) without the password but if you don't have a backup of the code then that isn't going to help you.
Can you not get in touch with the original programmer (or their company) some how to get the password. Ask around and find out when the last modification was done to the program and who did it. Then try and chase them down to get the password.
Also, try a few obvious ones like the company name etc.
Can you not get in touch with the original programmer (or their company) some how to get the password. Ask around and find out when the last modification was done to the program and who did it. Then try and chase them down to get the password.
Also, try a few obvious ones like the company name etc.
hinddhindsa
Member
OP
Thanks for the valuable suggestions.. 
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