The instruction that is mentioned in the link contains the targeted clue.
You can read the following in the Siemens cycle programming instruction:
Before calling the insertion cycle, you have to activate the insertion tool with 2 blades. The corrections of the two blades must be deposited in two
consecutive D-numbers of the tool.
The first one needs to be activated before the cycle call. The cycle itself determines which of the two tool correction gets activated for the particular processing step. After the cycle is completed, the correction number that was programmed before the cycle call is active again.
Regards
Ing. Egmont Schleich<br />T E C A S - Technology Assistance<br />www.tecas.at - Kundenorientierte Zyklenpakete und Lösungen <br /><!--sizeo:3--><span style="font-size:12pt;line-height:100%"><!--/sizeo-->Was einmal erdacht, kann nicht zurückgenommen werden.<br /><!--sizec--></span><!--/sizec-->aus "Die Physiker" von Friedrich Dürrenmatt