Siemens SINUMERIK 828D Function Manual page 1040

P3: Basic PLC Program for SINUMERIK 840D sl
13.13 Block descriptions
Single block processing can be selected/deselected only in the first call in the cycle.
The second machine control panel can be processed if parameter "ModeGroupNo" has been increased by
B#16#10. When parameterizing, the HHU number is contained in the lower nibble (lower 4 bits).
"BAGNo" = 0 or B#16#10 means that the mode group signals are not processed.
"ChanNo" = 0 means that the channel signals are not processed.
The INC selections are transferred to the mode group interface. The activation for this specification is done via
the DB10.DBX57.0 (INC-inputs in BAG-area active) through this block once after power up.
Machine control panels can still be handled in parallel by this module. The module 2 call for the 2nd machine
control panel in OB1 cycle must come after the call of the 1st MCP Support for two MCPs is provided in the
control panel blocks up to certain limits (support is not provided as standard for mutual interlocking of axis
selections with identical assignments on two MCPs).
Flexible axis configuration
It is possible to be flexible in the assignment of axis selections or direction keys for machine axis numbers.
Better support is now provided by the MCP blocks for the use of two MCPs, which are to run in parallel, in
particular for an application using two channels and two mode groups. Note that the axis-numbers are also
specified in the parameterized mode group number of the MCP block in the axis tables of the relevant MCP.
To afford this flexibility, tables for axis numbers are stored in DB 10.
For the first machine control panel (MCP) the table starts from the byte 8 (symbolic name: MCP1AxisTbl[1..22])
and for the second Machine control panel (MCP) starting from the byte 32 (symbolic name: MCP2AxisTbl[1..22])
for the second MCP. Here the machine axis numbers are to be entered byte-wise.
It is permissible to enter a value of 0 in the axis table. Checks are not made to find illegal axis numbers, meaning
that false entries can lead to a PLC Stop.
For FC 19, the maximum possible number of axis selections can also be restricted. This upper limit is set for the
first Machine control panel in DB10.DBW30 (symbolic name: MCP1MaxAxis) or for the second Machine control
panel in DB10.DBW54 (symbolic name: MCP2MaxAxis) set.
The default setting is 0, corresponding to the maximum number of configured axes. The axis numbers and the
limit can also be adapted dynamically. Afterwards, a new axis must be selected on FC 19. Axis numbers may not
be switched over while the axes are traversing the relevant direction keys.
The compatibility mode is preset with axis numbers 1 to 9 for both MCPs and restricted to the configured number
of axes.
Example
More than nine axes are to be controlled with FC19 using a special application. We recommend that you proceed
as follows:
• Reserve free key on MCP
• Evaluate this key as a flipflop
• Evaluate the flipflop output as pos. and neg. edge
• For pos. edge write one set of axis numbers in the axis table (DB10) and switch on LED via this key.
• For neg. edge write one set of axis numbers in the axis table (DB10) and switch on LED via this key.
1040
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions