Mitsubishi Electric M80V Series Manual page 313

M800V/M80V Series PLC Interface Manual
4 Explanation of Interface Signals
4.2 PLC Input Signals (Data Type: R***)
Cont. Signal name
Near reference position (per reference
A
position)
[Function]
This signal indicates that the control axis is near the reference position in the absolute position detection system.
This signal is output for the 1st reference position to the 4th reference position.
In the signal near the 1st reference position, the time required to output the signal is shorter than that of the "Near
reference position n-th axis" signal (NRFn) (the accuracy of ON/OFF timing during axis movement is improved).
[Operation]
 Using the n-th reference position as a reference, when the control axis is in the range set with the parameters, this sig-
nal turns ON, and turns OFF when the axis is not within the range.
 The near reference position signal is output with four bits for each axis.
<R register and corresponding axes>
R580
F E D C B
R581
F E D C B
<Output value and near n-th reference position>
High-order bit <--------------------->
0 0
0 0
0 1
1 0
Note
(1) The near reference position signal devices include X devices (NRF1 and following) which output signal only for the 1st
reference position, and the R registers (R580/R581) which outputs a signal for each reference position (1st reference
position to 4th reference position).
(2) The near reference position signal output width is set with the absolute position parameters "#2057 nrefp" and "#2058
nrefn". The near reference position signal output width is the same width for the 1st reference position to the 4th refer-
ence position.
(3) Near the 1st reference position, the signals are output to the conventional X device (NRF1 and following) and the R
registers (R580/R581) which output signals to each reference position.
[Related signals]
(1) Near reference position n-th axis (NRF1 to 8: X880 to 7)
IB-1501616-D
Abbrev. $1
R580, 1 R780, 1 R980, 1 R1180, 1 R1380, 1 R1580, 1 R1780, 1 R1980, 1
A 9 8 7 6 5 4 3
A 9 8 7 6 5 4 3
Low-order bit Near n-th reference position
0 1
1 0
0 0
0 0
$2 $3 $4
2 1 0
1st axis output value
2nd axis output value
3rd axis output value
4th axis output value
2 1 0
5th axis output value
6th axis output value
7th axis output value
8th axis output value
Near 1st reference position
Near 2nd reference position
Near 3rd reference position
Near 4th reference position
300
$5 $6 $7 $8