Siemens SINUMERIK 828D Function Manual page 478

K1: Mode group, channel, program operation, reset response
9.1 Product brief
• 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).
Program execution from external source
When complex workpieces are machined, the NC may not have enough memory for the programs. The
"Execution from external source" function enables subroutines to be called (EXTCALL) and executed from an
external memory (e.g. from the HMI Advanced hard disk).
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions