Photoelectric Sensors
True-Color-Sensor BFS 33M with IO-Link
Page 8 / 24
4.3. Step 3: Calibrate sensor
1. Place reference card for calibration into measuring position. The card is included
with the sensor. The position of the reference card must be equal to the position of
the target.
2. Set sensor gain to autogain. Therefore send value 1 to Index 0x00BE Subindex
0x02.
Alternatively send value 0 to Index 0x00BE Subindex 0x02 to deactivate autogain.
Use Index 0x00BE Subindex 0x01 to set the sensor gain so that the sensor signal
is not overdriven. (See Bit 15 / Byte 0 in the process data.)
If the signal is overdriven, reduce gain, and / or increase object distance.
3. Use Index 0x0401 to specify the Y target value for the calibration (Y-value is printed
on the reference card). If there is no reference card available, use a white piece of
paper. (Use 90,0 as Y-value).
4. Send 0xA4 to Index 0x0002 (system command) to execute calibration.
5. Wait 10 s until calibration is completed
6. Querying Index 0x0407 Subindex 0x02 returns the current calibration status
7. Continue querying until status 0x01 is returned
Status values and their meaning:
Value 0x05: Calibration on
Value 0x01: Calibration successfully completed (parameters are stored)
Value 0x07: Error (repeat calibration)
4.4. Step 4: Select work mode
The sensor has two different work modes.
Send 0x01 to Index 0x0402 Subindex 0x00: Precise-Mode is activated.
Send 0x00 to Index 0x0402 Subindex 0x00: Best-Fit Mode is activated.
For standard applications Best-Fit Mode is recommended.
4.5. Step 5: Teach and assign products
The sensor provides four options for teaching in products.
The Best-Fit Mode provides two options
Option A1 is a convenient, automated process for teach-in directly onto the
product to be queried. This option is recommended for standard
applications.
Option A2 involves entering the numeric values manually.
