Siemens SINUMERIK 840D sl Function Manual page 260

Operation via PG/PC (B4)
3.1 Brief Description
Machine control panel, OP030 and NCU are all connected either to the OPI bus or the MPI
bus. A homogenous network must be provided with respect to these components.
Implementation Variant 2
Operator panel front and up to three NCUs The machine control panel is permanently
allocated to the NCU concerned.
Figure 3-2
References:
/FB2/ Function Manual, Extended Functions; Several Operator Panel Fronts and NCUs (B3)
Operator interfaces
The operator interfaces are described in the operator's guides for the operator panel fronts
used.
References:
/BA/ Operator's Guide
/FBO/ Configuration of Operator Interface OP 030; BA, Operator's Guide OP030
Restrictions
If operation via PG/PC is used in addition to an OP030 operator panel front, the conditions
relating to configuration and coordination described in /FB2/, B3, "Several operator panel
fronts and NCUs" must be observed.
References:
/FB2/ Function Manual, Extended Functions; Several Operator Panel Fronts and NCUs (B3)
260
Configuration m:n corresponds to 1:3
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions