Siemens SINUMERIK 840D sl Function Manual page 1342

Detailed description
2.7 Structure and functions of the basic program
2.7.11 Configuration machine control panel, handheld unit, direct keys
General
Up to two machine control panels and one handheld unit can be in operation at the same
time. There are various connection options (Ethernet, Profibus) for the machine control panel
or HT8 (MCP) and handheld unit HT2, HT1 (HHU). It is possible to connect two MCPs to
different bus systems (mixed operation is only possible on Ethernet and Profibus). This can
be achieved using FB1 parameter "MCPBusType". In this case parameter is responsible
the right-hand decade is responsible for the first MCP and the left-hand decade for the
second MCP.
The components are parameterized by calling basic-program block FB 1 in OB 100. FB 1
stores its parameters in the associated instance DB (DB 7, symbolic name "gp_par").
Separate parameter sets are provided for each machine control panel and the handheld unit.
The input/output addresses of the user must be defined in these parameter sets. These input
and output addresses are also used in FC 19, FC 24, FC 25, FC 26 and FC 13. Further, the
addresses for status information, Profibus or Ethernet are also to be defined. The default
time settings for timeout and cyclic forced retriggering should not be changed. Please refer
to the Operator Components manual for further information on MCPs and HHU(HT2)-
components.
Activation
Each component is activated either via the number of machine control panels (MCPNum
parameter) or, in the case of the handheld unit, via the HHU parameter. The definition about
the connection of MCP, HHU is done via the FB 1 parameters
"MCPMPI", "MCPBusType" or "BHG", "BHGMPI".
Handheld unit (HT2)
In the handheld unit the addressing is done via a parameter of the GD parameter set. This
was necessary for reasons of compatibility of the parameter names.
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Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0