Programming Cycles - Siemens sinumerik 808d Programming And Operating Manual

Cycles

2.2 Programming cycles

2.2 Programming cycles
A standard cycle is defined as a subroutine with name and parameter list.
Call and return conditions
The G functions effective prior to the cycle call and the programmable offsets remain active
beyond the cycle.
The machining plane G17 for drilling cycles or G18 for turning cycles is defined before calling
the cycle.
With drilling cycles, the drilling operation is carried out in the axis standing vertically to the
current plane.
Messages output during execution of a cycle
During various cycles, messages that refer to the state of machining are displayed on the
screen of the control system during program execution.
These message do not interrupt the program execution and continue to be displayed on the
screen until the next message appears.
The message texts and their meaning are listed together with the cycle to which they refer.
Block display during execution of a cycle
The cycle call is displayed in the current block display for the duration of the cycle.
Cycle call and parameter list
The defining parameters for the cycles can be transferred via the parameter list when the
cycle is called.
Note
Cycle calls must always be programmed in a separate block.
Basic instructions with regard to the assignment of standard cycle parameters
Each defined parameter of a cycle has a certain data type. The parameter being used must
be specified when the cycle is called. The following can be transferred in the parameter list:
● R parameters (only numerical values)
● Constants
If R parameters are used in the parameter list, they must first be assigned values in the
calling program. Proceed as follows to call the cycles:
● with an incomplete parameter list
● by leaving out parameters.
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Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0