Mitsubishi Electric MELDAS C6 Interface Manual page 184

B con-
Signal name
tact
NEAR REFERENCE POINT
—
(FOR EACH REFERENCE
POINT)
[Function]
This signal indicates that the control axis is near the reference point when using the absolute point
detection system.
This signal is output for the 1st reference point to the 4th reference point.
Near the 1st reference point, the time for outputting the signal is shorter than the "near reference
point nth" signal (the ON/OFF timing accuracy during axis movement is improved).
[Operation]
(1) Using the nth reference point as a reference, when the control axis is in the range set with the
parameters, this signal turns ON, and turns OFF when the axis is not within the range.
(2) The near reference point signal is output with four bits for each axis.
(a) R register and corresponding axes
R242
R243
(b) Output value and near nth reference point
High-order bit
0
0
0
1
(Note 1) The near reference point signal device has X devices (X448 to) which output signal only
for the 1st reference point, and the R registers (R242 to) which outputs a signal for each
reference point (1st reference point to 4th reference point).
(Note 2) The near reference point signal output width is set with the absolute point parameters
"#2057 nrefp" and "#2058 nrefn". The near reference point signal output width is the same
width for the 1st reference point to the 4th reference point.
(Note 3) Near the 1st reference point, the signals are output to the conventional X device (X448 to)
and the R registers (R242 to) which output signals to each reference point.
[Related signals]
Near reference point nth axis (NRFn: X448 to)
6. EXPLANATION OF INTERFACE SIGNALS
6.2 PLC Input Signals (Data Type: R***)
Signal
abbreviation
F E D C B A 9
F E D C B A 9
Low-order
bit
0 0
0 1
1 0
0 0
1st system
R242, 243
8 7 6 5 4 3 2
8 7 6 5 4 3 2
Near n-th reference point
1 Near 1st reference point
0 Near 2nd reference point
0 Near 3rd reference point
0 Near 4th reference point
6-2-24
2nd system 3rd system
R342, 343 R442, 443
1 0
1st axis output value
2nd axis output value
3rd axis output value
4th axis output value
1 0
5th axis output value
6th axis output value