Detailed Description
2.12 Block descriptions
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-223
The Output network transfers the output signals of the machine control panel from the
VAR_TEMP image to the logical address. The data for the next cycle are also saved.
Axis selection extension
The Global_IN network must be modified if more than nine axes are selected. If other keys
and LEDs are to be used on the machine control panel here, proceed as follows:
1. The command UD DW#16#Value (comment: Clear all axis LEDs for display) deletes all
defined LEDs for axis selections. The bit mask is currently processing the nine axis
selection LEDs.
2. The command UW W#16# (comment: ”Masking all the axis selection buttons” ) checks
whether the direction has changed. The bit string must be adjusted here.
3. The branch destination list (SPL) must be expanded with new jump labels. The new jump
labels should be inserted in descending order before label m009. The selection
information should be extended for the new jump labels, as described for labels m009
and m008.
2.12.29 Signal/data descriptions
2.12.29.1 Interface signals NCK/PLC, MMC/PLC, MCP/PLC
General
The NCK/PLC, HMI/PLC and MCP/PLC interface signals are contained in the Lists
document.
References:
/LIS/ Lists
for SINUMERIK 840D, with references to the Description of Functions in which the signals
are described.
The NCK signals, which are evaluated and prepared by the basic program and transferred to
the user interface, are listed in the following Sections.
2.12.29.2 Decoded M signals
General
The M functions programmed in the part program, ASUB or synchronized actions are
channel specifically transferred from the NC to the PLC:
• M functions from channel 1: DB21
• M functions from channel 2: DB22
• Etc.
The signal length is one PLC cycle.
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