Pulse Frequency Modulation (Pfm) Output; Sync Master/Slave - Banner Q4X Instruction Manual

Q4X Stainless Steel Laser Sensor with Dual Discrete Outputs and IO-Link
Method Action
Push Button Press and hold the TEACH button for more than 2 seconds.
Remote Input
No action required.
3. Teach the sensor.
Method Action
Push Button Press the TEACH button.
Remote Input
Single-pulse the remote input.
Table 7: Expected TEACH Behavior for Dual (Intensity + Distance) Mode
Condition
One valid reference surface is taught
within sensing range
One reference surface is taught outside
the sensing range
One invalid TEACH Point

3.7 Pulse Frequency Modulation (PFM) Output

The Q4X can generate pulses whose frequency are proportional to the sensor's measured distance, thereby providing a method for
representing an analog signal with only a discrete counter. The sensing range of the sensor is scaled from 100 to 600 Hz (100 Hz
equals the near range limit of the sensor, 600 Hz equals the far sensing range limit). An output of 50 Hz represents a Loss of Signal
( ) condition where there is no target or the target is out of the sensor's range.

3.8 Sync Master/Slave

Two Q4X sensors may be used together in a single sensing application. To eliminate crosstalk between the two sensors, configure
one sensor to be the master and one to be the slave. In this mode, the sensors alternate taking measurements and the response
speed doubles.
Important: The master sensor and the slave sensor must be programmed for the same Response Speed and Gain and
Sensitivity settings. The master sensor and slave sensor must share a common power source.
1. Configure the first sensor as the master; navigate:
2. Configure the second sensor as the slave; navigate:
3. Connect the gray (input) wires of the two sensors together.
28
TEACH Result
Sets a dual (intensity + distance) window
centered around the taught reference
surface. The ± window size is the
previously used switching threshold, or
75% by default.
Sets a dual (intensity + distance) window
centered around the taught reference
surface that is outside the sensing range.
The sensing conditions may not be as
reliable.
No reference surface is taught, the output
will change when any object is detected.
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Result
Light Operate:
flash on the display. The DYN, FGS,
and BGS indicators flash.
Dark Operate:
flash on the display. The DYN, FGS,
and BGS indicators flash.
N/A
Result
The switching threshold flashes rapidly
T
and the sensor returns to Run mode.
Display
The switching threshold flashes on the
display.
flashes on the display.
flashes on the display.
.
.
and
and