RF602 [Revision 1.2.0] 28.01.2019
Laser Triangulation Sensors. RF602 Series
9
arrives. The above-mentioned parameters determine the method of the readout of the result
form the buffer.
Note 2
. If the bit-serial interface is used to receive the result, the time required for
data transmission at selected data transmission rate should be taken into account in the
case where small sampling period intervals are used. If the transmission time exceeds the
sampling period, it is this time that will determine the data transmission rate. The calculation
of time required to transmit the result is given in п.
Note 3
. It should be taken into account that the sensors differ in some variation in
the parameters of the internal generator, which affects the accuracy of the Time Sampling
period.
10.4. Zero point
This parameter sets a zero point of absolute system of coordinates in any point
within the limits of a working range. You can set this point by corresponding command or by
connecting AL input to the ground line (this input must beforehand be set to mode 4). When
the sensor is fabricated, the base distance is set with a certain uncertainty, and, if
necessary, it is possible to define the point zero more accurately.
10.5. Line AL operation mode
This line can work in one of the eight modes defined by the configuration parameter
value:
·
mode 1: indication of run-out beyond the range;
·
mode 2: mutual synchronization of two or more sensors ("Slave");
·
mode 3: mutual synchronization of two or more sensors ("Master");
·
mode 4: hardware zero-set line;
·
mode 5: hardware laser switch OFF/ONN;
·
mode 6: encoder;
·
mode 7: input;
·
mode 8: reset of the Ethernet packets counter.
In the
"Indication of run-out beyond the range"
mode, logical “1” occurs on the AL
line if an object under control is located within the working range of the sensor (within the
selected window in the range), and logical "0" occurs if the object is absent in the working
range (within the selected window). For example, in such mode this line can be used for
controlling an actuator (a relay) which is activated when the object is present (absent) within
the selected range (Fig. 3.1).
The
"Mutual synchronization"
mode makes it possible to synchronize
measurement times of two and more sensors. It is convenient to use this mode to control
one object with several sensors, e.g., in the measurement of thickness. On the hardware
level, synchronization of the sensor is effected by combining AL lines (Fig. 3.2). Using the
parametrization program, one of the sensors should be set to the "Master" mode, and the
rest - to the "Slave" mode.
In the
"Hardware zero-set"
mode, connection AL input to the ground potential sets
the beginning of coordinates into the current point (Fig. 3.3)*.
In the
"Hardware laser switch OFF/ON"
mode, connection AL input to the ground
potential switches the laser ON/OFF (Fig. 3.3)*.
In the
"Encoder"
mode, the AL and IN lines work as inputs of quadrature signals. In
this mode, the encoder can be connected to these lines, and the measurements will be
synchronized with the encoder.
In the
"Input"
mode, the AL line state is transmitted in the status word in the Ethernet
packet.
