N4: Own channel - only 840D sl 
  9.3 Activation and deactivation 
Extended Functions 
Function Manual, 03/2013, 6FC5397-1BP40-3BA1 
571 
Block search  
In the case of a search for a block containing a nibbling function, it is possible to program 
whether the punch stroke is executed at the block beginning or suppressed. 
The setting is programmed in machine data: 
MD11450 $MN_SEARCH_RUN_MODE  
 
Bit  Value  Meaning 
0  Punch stroke at beginning of block is suppressed. 5 
1  Punch stroke at beginning of block is executed. 
 
References: 
Function Manual, Basic Functions; Mode Group, Channel, Program Operation, Reset 
Response (K1), Section: 
9.3.3  Compatibility with earlier systems 
Use of M functions 
As in earlier versions, macro technology allows special M functions to be used instead of 
language commands (compatibility). 
The M functions and equivalent language commands as used in earlier systems are as 
follows: 
 
M20, M23 ≙ 
SPOF 
M22 
≙ 
SON 
M25 
≙ 
PON 
M26 
≙ 
PDELAYON 
 
 
 
Note 
M functions can be configured in machine data. 
When M functions are assigned to language commands, it must be noted that M functions 
are organized in auxiliary function groups.