IAI America SCON-C - Manual (Page 242)

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Appendix
6. Basic Example of Positioning Sequence
The following example illustrates a basic sequence that can be used to create a positioning sequence for your SCON controller.
The items shown with a shaded background indicate PIO signals of the SCON controller.
Note: This basic sequence cannot be used in solenoid valve mode 2 (3-point type).
Waiting for completed position to be read
(Completed position decoding circuit)
Position complete
Completed position code
Completed position 1
(The timer period
must be at least 2
to 4 times the
PLC scan time.)
Completed position 2
Completed position 3
Completed position 4
Completed position 5
Created for as many as the number of positions.
(Position 1 positioning circuit: When position 1 is set as the home)
Home return request
Home return start pulse
Auxiliary home return start pulse
Position 1
positioning
start request
Position 1
positioning
start request
Position 1 (home) positioning
start pulse
Auxiliary position 1 (home) positioning
start pulse
Convert the positioning start request signal to a pulse so that one start
signal is issued for each positioning operation.
Home return complete
Auxiliary position 1 (home) positioning
start
Position achieved by
completion of current
positioning
Auxiliary positioning
start signal for next
positioning
Position 1 (home) start check
Position 1 (home) position complete
Home return request
Whether or not the positioning to the specified position has
completed is checked.