Mitsubishi Electric MELDAS C6 Interface Manual page 249

B con-
Signal name
tact
REFERENCE POINT
—
POSITION SELECT 1, 2
[Function]
It is also possible to return to the nth reference point in the manual reference point return mode.
This signal is used to select the number of the reference point (n) to return to. Normally both the
reference point position select signals 1 and 2 are turned OFF, so 1st point reference return is
performed.
[Operation]
Reference point position select signal 1, 2 is valid when:
(1) Reference point return mode is ON ("1").
(2) Manual start condition is held.
Reference
point position point position
select 2
0
0
1
1
(Note 1) Returning to the first reference point must be performed before returning to the second,
third or forth reference point.
[Operation sequence]
Reference point return mode
Reference point select
Manual start (Feed axis select (+)/(-))
Axis motion
Nth reference point reached
[Related signals]
(1) Reference point return mode (ZRN: X604)
(2) Feed axis select (+Jn, -Jn: Y44B, Y44C)
(3) N-th reference point reached (ZP11~ZP41: X444~X447)
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
ZSL1, 2
Reference
Return point
select 1
0 1st reference point
1 2nd reference point
0 3rd reference point
1 4th reference point
1st system
Y730, 731
Even when "Reference point select"
signal changes, point selected at start
of motion is held.
Nth reference point return request
Goes to nth reference point
6-3-52
2nd system 3rd system
Y810, 811 Y8F0, 8F1
No change