Manual – Data Matrix Positioning System PCV80A-F200-R4-V19-SEW
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3
Use and application
Product Description
3
Product Description
3.1
Use and application
The PCV80A read head is part of the positioning system of the incident light method
used by SEW-EURODRIVE. The positioning system is equipped, among others, with a
camera module with integrated illumination unit. In this way, the read head can detect
position marks printed on a self-adhesive code strip in the form of data matrix codes.
The code strip is usually mounted in a stationary manner to a fixed part of the system
(such as elevator shaft, overhead conveyor mounting rail). The read head is mounted in
parallel to a moving "vehicle" (such as elevator cab, overhead conveyor chassis).
Max. length of the code strip:
With appropriate resolution, the positioning system can also be used without limitations
for large-scale systems.
The extensive, user-friendly parameterization options and the freely configurable inputs
and outputs of the read head allow for easily adapting the read head to the specific ap-
plication.
3.2
RS485 interface
The read head is equipped with an RS485 interface for communication purposes, such
as for parameterizing the read head functions or for reading out current process data
during operation. This interface is operated in 8-E-1 mode and fitted with a terminating
resistor that can be activated or deactivated by parameterizing the sensor head accord-
ingly. The RS485 interface supports the following transfer rates:
• 38400 bit/s
• 57600 bit/s
• 76800 bit/s
• 115200 bit/s
• 230400 bit/s
Data structure of the RS485 interface:
Resolution of the read head
Maximum length of the code strip
10 mm
10 km
1 mm
10 km
0.1 mm
1.5 km
8061716491
Bit 0
LSB
MSB
Start
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Parity
