Sinamics S120 and measuring wheel

Hello,

one solution could be to evaluate the handwheel directly inside the drive and your 2 axes are geared axes in synchronous operation.

There is a drive-based application for synchronism. As a leading value you can use the "measuring wheel" option which is in your case the handwheel.

https://support.industry.siemens.com/cs/ww/en/view/109757232

So the motion functionality is completely inside the drive. The PLC is only "controlling" the machine by commanding the functions of the axes (like gearing, jogging, homing etc.). For this application there is only a ready-to-use function block for S7-1200/1500. S7-300 control is also possible of course but therefore no FB exists.

Of course the functionality could be also done by technology PLCs (like S7-1500T PLC) or SIMOTION with technology objects, but I am not sure if your hardware is fixed already.

Hello,

you can use the application even without any PLC if you want, as the motion functionality is completely done inside the drive system. The LMCSINA block is just an option. It is a ready to use function block to control the application by PLC (S7-1200 and 1500 in TIA Portal).

But of course you can also set up your own block and communication to the PLC (with STEP 7 V5 for example) and free telegram configuration. I think you do not need much control bits to achieve your functionality (switching on the axis, maybe some homing or jogging and synchronizing). So the communication can be done on your own. But just a suggestion - of course you can also look for a different solution.

Hello,

yes this is possible. There is a DCC logic inside the application which evaluates the encoder raw signals and calculates a mechanic-depending position out of it. (measuring wheel function)

The measuring wheel encoder is configured as 2nd or 3rd motor encoder on one of your slaves. But this is all described in the manual I sent you before. There is a commissioning chapter with step by step instructions.

For reading in the encoder values it might be necessary to have an additional hardware component like an SMC (sensor module), if the encoder is not a DRIVE-CLiQ encoder. Depending on the encoder type you would need a SMC10/20/30/40. 

In general I would recommend to contact your local Siemens Sales partner to talk about a good solution, the hardware and software for you.

In the application manual you will also find a contact mail address at the end to get help for the application (even before you decide to use it and to decide about whether the application is suitable for you or not).