How To Use Mark Detection Function - Mitsubishi Electric QD77MS User Manual

Storage item
External command
[Pr.95]
signal selection
External command
[Pr.42]
function selection
Storage item
Mark detection
[Pr.800]
signal setting
Mark detection
[Pr.801] signal
compensation time
Mark detection data
[Pr.802]
type
Mark detection data
[Pr.803]
axis No.
Latch data range
[Pr.805]
upper limit value
Latch data range
[Pr.806]
lower limit value
Mark detection
[Pr.807]
mode setting

[2] How to use mark detection function

The following shows an example for mark detection by the external command
signal (DI2) of axis 2.
The mark detection target is axis 1 real current value, and the all range is
detected in continuous detection mode.
(1) Allocate the input signal (DI2) to the external command signal of axis 2, and
set the "high speed input request" for mark detection.
Setting
value
2 Set "2: DI2" to the external command signal of axis 2.
Set "4: High speed input request" as the function used in
4
the external command signal of axis 2.
(2) Set the following mark detection setting parameters. The optional mark
detection setting No. can be set.
Setting
value
Set "2: Axis 2" to the external input signal for mark
2
detection.
Set "0: (No compensation)" to the compensation time
0
such as delay of sensor.
Set "2: Real current value" to the target data for mark
2
detection.
Set "1: Axis 1" to the axis No. of target data for mark
1
detection.
Set "0" to the valid upper limit value for latch data at
0 mark detection. (Mark detection for all range is executed
by setting the same value as lower limit value.)
Set "0" to the valid lower limit value for latch data at mark
0 detection. (Mark detection for all range is executed by
setting the same value as upper limit value.)
Set "0: Continuous detection mode" to the mark
0
detection mode.
(3) Turn the power supply OFF or reset of PLC CPU to validate the setting
parameters.
(4) The mark detection starts by setting "1: Validates an external command." in
"[Cd.8] External command valid" of axis 2 with the sequence program.
Refer to "[Md.800] Number of mark detection" or "[Md.801] Mark detection
data storage area" of mark detection setting No. set in this section (2) for the
number of mark detections and mark detection data.
Storage details/storage value
Storage details/storage value
14 - 43
Chapter 14 Common Functions
Buffer memory address
QD77MS2
QD77MS4
—
212 (62+150n)
n: Axis No.-1
Buffer memory address
QD77MS2
QD77MS4
54000+20k
54001+20k
54002+20k
54003+20k
54006+20k
54007+20k
54008+20k
54009+20k
54010+20k
k: Mark detection setting No.-1
QD77MS16
219
(69+150n)
QD77MS16