Siemens SINUMERIK 840D sl Commissioning Manual page 118

NCK start-up
10.2 System data
● Line "Capacity of interpolator buffer":
118
The capacity indicator MD28060 NUM_IPO_Buffer_SIZE is indicated in %.
This display indicates whether batch preparation for batch processing can commence.
A jerky processing in track control, if for instance a number of short traversing sets have
been programmed in succession, is a typical indicator of the IPO buffers becoming full.
Capacity indication is channel-specific.
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
IBN CNC: NCK, PLC, drive