Siemens SINUMERIK 840D sl Programming Manual page 715

Parameter transfer
Parameter transfer to technology cycles is possible. Both simple data types which are
transferred as formal "Call by Value" parameters and default settings which take effect when
technology cycles are called up are taken into account. These are:
● Programmed default values when no transfer parameters are programmed.
● Standard parameter with initial values.
● Non-initialized actual parameters with a default value are transferred.
Sequence
Technology cycles are started as soon as their conditions have been fulfilled. Each line in a
technology cycle is processed in a separate IPO cycle. Several IPO cycles are required to
execute positioning axes. Other functions are executed in one cycle. Blocks are sequentially
executed in the technology cycle.
If actions that are mutually exclusive are called up in the same interpolation cycle, the action
that is called up from the synchronized action with the higher ID number becomes active.
Examples
Example 1: Axis programs are started by setting digital inputs
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
Motion synchronous actions
10.5 Technology cycles
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