KEPServerEX 6.16 - Fanuc Focas - Read Data

Hi, 

This usually happens when the FOCAS connection is established but the CNC parameter/function being requested is not supported or not accessible on the controller. In that case KEPServerEX returns Native / Unknown / No Value.

A couple of things worth checking:

First, verify the FOCAS option on the CNC. The 0i-TF controller must have the Ethernet FOCAS option enabled. If the option is not licensed on the machine, the driver can connect but most addresses (like cnc_rdpgrnum_Running) will return no value.

Second, confirm the FOCAS port on the CNC. Fanuc controllers typically use 8193, which matches the configuration shown, but it must also be enabled on the CNC side in the Ethernet settings.

Third, try reading a basic FOCAS test address to confirm communication. For example test with a simple machine status item such as program number or alarm status. If those also return Unknown, the issue is almost always CNC option or access permissions.

Fourth, check the CNC mode. Some FOCAS functions only return values when the machine is in AUTO or RUN state, not in EDIT or MDI.

Finally, review the driver model setting. Since the device is configured with Model = Open, confirm that the address syntax exactly matches the supported FOCAS functions for that controller series.

In short, the configuration in KEPServerEX looks mostly correct. The Native / No Value result typically indicates the FOCAS function cannot be executed on the CNC, most commonly due to the FOCAS Ethernet option not being enabled or supported on the controller.

Thanks,