Configuration Machine Control Panel, Handheld Unit, Direct Keys - Siemens SINUMERIK 828D Function Manual

P3: Basic PLC Program for SINUMERIK 840D sl
13.8 Structure and functions of the basic program
13.8.11

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. For the machine
control panel or HT8 (MCP) and hand-held unit HT2, HT1 (BHG) there are various connection options (Ethernet,
PROFIBUS). 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 parameter, the
right-hand decade is responsible for the 1st MCP and the left-hand decade for the 2nd 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 MCP and HHU connection settings are entered in FB1
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.
Configuration
Essentially, there are various communication mechanisms for transferring data between the MCP/HHU and PLC.
These mechanisms are characterized by the bus connection of the MCP and HHU. In one case (Ethernet), data
is transported via the "CP 840D sl".
The mechanism is parameterized completely via the MCP/HHU parameters in FB1.
In the other case the transmission is done through the PLC-operating system through the Profibus configuration
The parameter setting is done via STEP 7 in HW-Config. To enable the basic program to access these data and
failure monitoring of MCP/HHU, the addresses set in FB 1-parameters must be made available to the basic
program.
An overview of the various coupling mechanisms appears below. Mixed operation can also be configured.
If an error is detected due to a timeout monitor, an entry is made in the alarm buffer of the PLC CPU (interrupts
400260 to 400262). In this case, the input signals from the MCP or from the handheld unit (MCP1In/MCP2In or
BHGIn) are reset to 0. If it is possible to resynchronize the PLC and MCP/HHU, communication is resumed
automatically and the error message reset by the GP.
Note
In the following tables, "(n.r.)" indicates "not relevant".
894
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions