Cancel The Actual Subprogram Level (Cancelsub); Technology Cycles; General - Siemens SINUMERIK 840D sl Function Manual

Detailed description

3.8 Technology cycles

3.7.23

Cancel the actual subprogram level (CANCELSUB)

Using CANCELSUB, in the channel in which the synchronized action is executed, the NC
program active in the current subprogram level is canceled and in the calling program, the next
higher program level is selected. There, program execution is continued normally.
Properties
● For each call, only the current subprogram level is canceled.
● After a cancellation, the next higher program level can only be canceled if a return jump is
made from the canceled subprogram level.
● The main program level cannot be canceled.
Syntax
CANCELSUB
Meaning
CANCELSUB:
See also
The cancellation of the current subprogram level can be realized using the channel-specific
NC/PLC interface signal, also from the PLC user program, which is functionally identical:
DB21, ... .DBX6.4 (program level cancellation)
3.8 Technology cycles
3.8.1

General

Definition
A technology cycle is an NC program that is called in the action part of a synchronized action.
All language elements and system variables that are also used in the action part of a
synchronized action can be used in a technology cycle. In addition, there are also the following
language elements that may only be used within a technology cycle:
● Chapter "System variables for synchronized actions (Page 20)"
● Chapter "User-defined variables for synchronized actions (Page 58)"
● Chapter "Language elements for synchronized actions and technology cycles (Page 60)"
● Chapter "Language elements for technology cycles only (Page 66)"
● Chapter "Actions in synchronized actions (Page 67)"
116
Cancels the current subprogram level
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
Synchronized actions