Siemens SINUMERIK 840D sl Function Manual page 456

K1: Mode group, channel, program operation, reset response
9.1 Product brief
● Type 4 with calculation at block end point
● Type 5 automatic start of the selected program point with calculation of all required data
from history
● Automatic start of an ASUB after a block search
● Cascaded block search
● Cross-channel block search in "Program test" mode
Program operation
The execution of part programs or part program blocks in AUTOMATIC or MDI modes is
referred to as program operation. During execution, the program sequence can be controlled
by PLC interface signals and commands.
For each channel, basic settings or channel-specific machine data can be specified. These
initial settings affect, for example, G groups and auxiliary function output.
A part program can be selected only if the relevant channel is in the Reset state.
Furthermore, all further program runs are handled by PLC interface signals and the
corresponding commands.
● Start of part program or part program block
● Part program calculation and program control
● RESET command, program status, and channel status
● Responses to operator and program actions
● Eventdriven program calls
Asynchronous subroutines (ASUBs), interrupt routines
Interrupt inputs allow the NC to interrupt the the current part program execution so that it can
react to more urgent events in interrupt routines or ASUBs.
Single block
With the single-block function, the user can execute a part program block-by-block.
There are 3 types of setting for the single-block function:
● SLB1: = IPO single block
● SLB2: = Decode single block
● SLB3: = Stop in cycle
Basic block display
A second basic block display can be used with the existing block display to display all blocks
that produce an action on the machine.
The actually approached end positions are shown as an absolute position. The position values
refer either to the workpiece coordinate system (WCS) or the settable zero system (SZS).
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions