Siemens SINUMERIK 840Di Function Manual page 1255

Fig. 2-19 Configuring global data
2.7.12 Switchover of machine control panel, handheld unit
Requirements
Only Ethernet variants support switchover/deactivation of the machine control panel (MCP)
or handheld unit (HHU) as standard. On MPI and PROFIBUS variants, this function is either
not supported at all or can only be implemented in restricted format requiring additional effort
on the part of the user. For example, with the PROFIBUS variant of the MCP, the DB77 data
area specified for MCP1, MCP2 or HHU can be used for the MCP pointer on FB1. The MCP
slave bus address must be set correctly under MCPxBusAdr as this is used as the basis for
monitoring.
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2.7 Structure and functions of the basic program
Detailed Description
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