Step5 V7.2 to SINUMERIK 810T

Hi Sky Diver840,

the cable you are using to connect pcin won't work in connection to the plc 'cause pcin uses rs232 interface whilst the plc demands a current loop 20 mA interface.

This current loop interface is not provided by a pc or laptop but only by a pg. Using a pg 7xx (or field pg or power pg) you ought to have a cable 6ES5734-2xxxx to connect to a S5 plc. As I recall the Sinumerik 810 is connected to a plc S5-150 hence you 'll need an adapter described in this link:

https://support.industry.siemens.com/tf/de/en/posts/54093

If you are working on a pc the pc-plc-adapter cable of Siemens won't work because it needs a 5V supply provided by the plc in the pg interface. I'm sorry but the pg interface in the S5-150 doesn't provide this 5V supply.

To solve this topic I recommend to use this usb - S5-adapter provided by cd-elektonik:

http://www.cdelektronic.de/products/S5_PG-USB/s5_pg-usb.html

You 'll need these items to connect to a plc 150:
   1 x    9359-1                    PG-USB Kabel, 3m
   1 x    9359-5-150-USB     AG-150-Adapter für PG-USB

Good luck