The value of the second servo encoder is linked to the NC virtual axis of Beifu PLC for display

In the design process , A second encoder is required , That is, add an encoder , Link location data to NC Virtual axis , This article describes the servo second encoder link to NC Virtual axis method .

1. Operation process
   1.1. Biff Beckhoff
   1.1.1. Test the hardware
   This article is based on CX5120 controller ,TwinCAT3, Servo is Huichuan IS620N, It comes with an encoder .
   

1.1.2. IO scanning
First scan IO As shown below , The configuration related to the third-party servo will not be repeated here .

1.1.3. PDO link
This test mainly links the encoder position to NC In virtual axis , Don't make NC Related control , Therefore, it is only necessary to link the driver position of the servo to NC Pin of , As shown below ：

1.1.4. Encoder type selection
The new virtual axis defaults to virtual encoder , Therefore, the type of encoder also needs to be selected , Generally speaking, it is CanOP402 The type of , As shown below

1.1.5. Actual test
After configuring the above operations , Activate configuration , Make sure that the servo is OP state , Rotating motor , You can see NC Of online The interface has position feedback , As shown below

thus , adopt NC Virtual axis receiving servo encoder signal function test is completed . stay PLC In the program, you can pass NC The function block obtains the axis position 、 Speed etc. .