Delta MMC120 - Manual (Page 103)

MMC120 Linear Motion Control Module Appendix B: Event Control
Delta Computer Systems, Inc 360/254-8688 103
Notes
Reading the Current Step
The Step field value indicates which step the axis is current executing; the P/C can read this field to find the
step being executed. When the axis is not executing steps this field is 0.
Terminating a Loop
Step chains which are not endless loops should end with Step zero. The last Step which executes a command
should have a link type 0 (zero).
Interrupting a Sequence
You can exit out of a sequence before it reaches its end (if it has an end) either by issuing a command from the
Programmable Controller or DCS120, or by starting another event sequence. Programmable Controller
commands and DCS120 commands have priority over all Step commands.
Multiple Axes Can Use the Same Steps
Both axes can be made to follow identical patterns simultaneously by using the same steps on both.
No Conditional Branching
Step sequences cannot branch. An axis cannot wait for more than one condition (Link Type) at a time.