KEYENCE AP-V42A(P) - Manual (Page 4)

4
12. AI Tuning/Active Tuning (A-1)
AI tuning
Active 2 point tuning
Active 1 point tuning
Suction
Suction
Vacuum burst
P1 P2 T1
Automatic
configuration
Automatic
configuration
_
_
_
Automatic
configuration
Automatic
configuration
Manual
configuration
_
Application Type
P2
P1
Time
Zero shift input
T1
V
acuum
■ Perform these steps first
Select the setting display as indicated below before performing the
tuning procedures.
AI tuning:
Select P1 from the settings display.
Active 2 point tuning: Select T1 from the settings display.
Active 1 point tuning: Select P2 from the settings display.
■ AI tuning / tuning optimized for suction detection
AI tuning samples pressure variations during continuous operation and
automatically configures the zero shift timer setting (T1) and pressure
setting (P1) for the most stable possible detection.
Device operation
with no target
object present
Operation
for several
cycles
Operation
for several
cycles
Operation
for several
cycles
Step 1)
Step 2)
Step 3)
Device operation
with target
object present
Device operation
with no target
object present
Sensitivity
difference
display
Sampling
Sampling
Sampling
Start
Start
Start
Finish
Finish
Finish
■ Active 2 point tuning / tuning to correct AI tuning settings
The zero shift timer setting is manually configured, and the sensor au-
tomatically selects the best pressure setting (P1) for this value.
Step 1)
Step 2)
Device operation
with no target
object present
Operation
for several
cycles
Operation
for several
cycles
Device operation
with target
object present Sensitivity
difference
display
Sampling
Sampling
Start
Start
Finish
Finish
■ Active 1 point tuning / tuning optimized for vacuum burst
detection
The sensor automatically selects the best pressure setting (P2) for
vacuum burst detection.
Target object
present
Setting
display Sampling Start Finish
13. Ambient Pressure Compensation
Open the applied pressure to the surrounding air so that it equals the
ambient pressure and press the
button for 3 seconds or more
while the current value or reference value is being displayed.
The ambient pressure point will be corrected.
*Ambient pressure can be corrected within a range of ±5 % of F.S. The
corrected ambient pressure will be maintained even if power to the sen-
sor is turned off.
11. Explanation of Features
■ Zero shift
Zero shift input forces the pressure at that time to be defined as zero.
This feature is useful in applications that require the detection of a cer-
tain amount of pressure fluctuation without being influenced by changes
in the original pressure.
0
-0.1MPa
O.K.
Zero shift input
Zero shift input
-0.5MPa
N.G.
1MPa
(Example: leak testing)
Zero shift input received when a container is filled with air will allow the
amount of leak after a certain time to be displayed as negative pressure.
This approach eliminates the influence of small variations in the final fill
pressure of the container.
The pressure value (reference value) when zero shift input is received
can be verified from the current value display by pressing the
button
to switch to the reference value display.
(
⇔ )
Press the button once more to return to the current value display.
Note:• Shift input is valid across a range for -3% to +100% of F.S. for a
shift amount of 0 (0 to 100% for AP-44/48).
• The reference value is reset when power to the sensor is turned
off.
■ High-resolution mode
The resolution of all displays is increased by a factor of 10.
Normal
mode
High-resolution
mode
■ Analog output
A voltage corresponding to the pressure value is output.
* Ambient pressure compensation is also applied to analog output.
Head 1 V to 5 V
AP-41/41M 0 to -101.3 kPa
AP-43 0 to +1 MPa
AP-44/48 -101.3 to +101.3 kPa
■ Peak/bottom hold display
The maximum (minimum) values are displayed continuously after power to
the sensor is turned on.
When A-1 mode is selected, the following active hold display is activated.
How to display hold values/
From current value/reference value display
+ / Activates peak hold display.
+ /Activates bottom hold display.
The minimum value during zero shift input is displayed for the bottom
hold during A-2 mode operation.
Resetting the peak/bottom hold values/
Pressing
for 3 seconds or more while the peak and bottom hold
values are being displayed will reset the values.
*The values will also be reset when power to the sensor is turned off,
and when the device's detection mode or operating mode is changed.
● During A-1 mode operation (active hold display)
The hold values are reset each time the pressure value exceeds (or falls
below) the setting, and the peak hold (bottom hold) will then vary from
this point.
Peak hold value: The peak hold value will be reset once a value is
encountered that exceeds setting P1, and new peak
values will be held from that point.
Bottom hold value: The bottom hold value will be reset once a value is
encountered that falls below setting P2, and new
bottom values will be held from that point.
■ Power-save
The value display will be turned off during power-save operation to re-
duce the amount of power consumed.
● Use of any keys during eco mode operation will revert the sensor to
its normal display. The sensor will return to the eco display when
there is no key input for a period of 3 minutes.