Hello

I want to make a small change in the S5 SPS program but I don’t manage to assess the machine over the current interface. I have an old laptop with serial interface. On that laptop I have Step5 from Siemens in the connection cable I have a converter from RS232 to the current interface (20mA TTY) the plug on the side of the Simumerik is wired actively, the Simunerik is the current source.
When I want to establish a connection with Step5, then the LED on the converter lights up and after a few seconds the message “waiting time exceeded” is displayed in Step5.
I have the feeling that I have to switch something on (on the Sinumerik) ( I have already tried setting data 5010 00000100 and 5011, different baud rates and stop bits etc but nothing has worked)

My question: How can I communicate with the Sinumerik over the current interface? What do I have to set up and what’s the correct course of action?


I would really appreciate if anybody could help me out.


Many thanks in advance
Richard