Siemens SINUMERIK 840Di Function Manual page 559

The following options are available for changing the dry run feedrate:
1. Dry run feedrate is the maximum of the programmed feedrate and setting data SD42101.
2. Dry run feedrate is the minimum of the programmed feedrate and setting data SD42101.
3. Dry run feedrate is setting SD42101, regardless of the programmed feedrate.
A dry run feedrate can be selected in the automatic modes and activated on interruption of
an automatic mode or end of a block.
For more information on feedrate control, refer to:
References:
/FB1/ Description of Functions, Basic Machine; Feeds (V1)
Display
Active dry run feedrate mode is indicated by a reversal in the relevant field in the status line
on the operator interface.
2.4.4 Skip part-program blocks
Identification
The operating function must be selected, the function must be activated, and the blocks in
question must be identified with a slash character.
Functionality
When testing or breaking in new programs, it is useful to be able to disable or skip certain
part program blocks during program execution.
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Detailed Description
2.4 Program test
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