Decoding Single Block Sbl2 With Implicit Preprocessing Stop; Single Block Stop: Suppression Using Sblof - Siemens SINUMERIK 828D Function Manual

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K1: Mode group, channel, program operation, reset response

9.12 Single block

Decoding single block SBL2 with implicit preprocessing stop

Asynchronicity

As a result of preprocessing of part program blocks, the reference between the current block display relative to

the main run status of the NCK and the variable values displayed on the HMI can be lost. The operator display

then shows implausible variable values.

Preprocessing stop for each block

A preprocessing stop is executed for active SBL2 with each block with the channel-specific setting data SD42200

$SC_SINGLEBLOCK2_STOPRE (activate debug mode for SBL2). This suppresses preprocessing of part

program blocks and maintains the relationship between the current block display and the variable values display.

This variant of SBL2 does not maintain an accurate contour. In other words, as a result of the

preprocessing stop, a different contour may be generated from the one created without

single-block mode or with SBL1.

Application: Debug mode for testing part programs.

Single block off

Programs characterized by the SBLOF language command are executed completely in one block as with every

type of single block.

SBLOF is also valid in the called subroutines.

Example for subroutine without stop in single block:

PROC EXAMPLE SBLOF

At the return command, the decision is made whether to stop at the end of the subprogram:

Return jump with M17

Return jump with RET

Stop at the end of the subprogram

No stop at end of subroutine

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

Basic Functions

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