Hi All,

I am new to manufacturing and attempting to explore using OPC UA programs through python-based client. I'm hoping to get more information for preventative maintenance purposes.

I have read in the manual attached (SINUMERIK 840D sl NC variable and interface signals) that DB1002.DBDn holds information surrounding the spindle temperature sensors. However, I do not understand how it all comes together in an address. Specifically on page 1380 and similar instances of variable "n" on pages 1378 and 1384.

For example, I think that reading DB1002.DBD04.0 should give me temperature sensor actual value in Celsius for spindle 1 sensor 1. DB1002.DBW24.0 should give the temperature sensor actual value in Celsius for spindle 1 sensor 2. Or, if looking for ALM active alarms, DB1002.DBW0.7? The syntax used, eg. "DBWn+0", confuses me.

Is anyone familiar with finding this information or can tell me how to properly address a spindle temp sensor or byte mapped with the above syntax?

Are you sure your spindle supports this information?

I believe only the Siemens 2SP1 series of motor spindles with a special drive-cliq SMI-24 sensor module supports the additional sensor data for that data block.

Steve_A

Hello, Steve_A,

I am not sure that the spindle supports this information. Now that I know of these dependencies I will have a look into them. Thank you!

Do you recommend any material to read into, other than product information, that would help with identifying these kinds of prerequisites? Or even a course? Additionally, do you know whether I had the right idea behind the addressing for pulling the bytes of data from the PLC? It would be helpful to know for future reference, even if my equipment does not currently support it.

Best regards,

AutoGen_4288445

It takes a bit of searching to find the relevant manuals, but they usually reference other sources of information as needed.

For this issue, see the section of the axes and spindles function manual at https://support.industry.siemens.com/cs/ww/en/view/109801259/145387418635.  This is for the 840DSL control, but it is similar for Sinumerik One.  All manuals are available at https://support.industry.siemens.com/cs/us/en/view/109766201

Steve_A