Ring number (ring_nr)
The SERCOS ring number is entered here to denote the axis to which it is connected. This value must currently be set to 0 since no multi-ring operation is possible.
| Variable name | Type | permitted range | Axis type | Dimension | 
| ring_nr | UNS16 | 0 | T | ---- | 
| 
 | 
 | 
 | R | ---- |