Communication Via The Serial Interface; Basic Characteristics And Parameters Of The Serial Sensor Interface - Sensopart FT 50 C S1 Série Instructions De Service Et De Montage

Mounting and
operating instructions
Step Menu item Activity
7 Press
Exit menu
8 Press
8

Communication via the serial interface

All FT 50 C ... S1 sensors are equipped with a bus-compatible, serial interface (RS485) for bi-directional transmission
of colour values as well as the setting of sensor functions. The overriding control system controls data exchange.
Data transfer occurs through an exchange of short telegrams.
• This makes it possible to teach-in any number of colours and store them as colour vectors (reference value incl.
tolerances) in the control system via the interface.
• Before beginning the process, the relevant reference colour is transferred back to the sensor. In operating con-
ditions, the sensor compares the actual colour with the reference colour and signals the result to the switching
output. Repeated teaching of colours is unnecessary.
• During on-line access via the RS485 interface, there are 2 further possibilities:
- The internally stored colours / colour ranges (max. 5) can be evaluated separately.
- The actual values can be transferred via the interface. In this case comparison between the actual colour
and the reference colour is carried out via the control system.
INFORMATION
For a convenient parameterization of the S1 sensor types, there is an operating software
„ProgSensor" available for download on our website (www.sensopart.de).
If several sensors are connected via the RS485 bus, reflections can occur which may impair
transmission. At the end of the RS485 bus, the cable must therefore be fitted with a resistor
corresponding to the characteristic impedance of the used cable (normally 120 Ohm).
8.1

Basic characteristics and parameters of the serial sensor interface

The serial interface of the sensor has the following characteristics:
Hardware
Data transfer rate
Stop bits
Parity
Bits / Byte
Access method
Sensor address
FT 50 C...S1 Colour sensor - GB - 068-13821 - 10.10.2011-04
Picture follows Remark
C S +/F
SET
fixed factory configuration
RS485, half-duplex
Pin 1 Data+ (Y/A), Pin 5 Data- (Z/B)
1
no
8
Master / Slave (the sensor acts as
slave)
Continue to „Exit menu".
The settings are stored and configuration mode is exited.
modifiable
4800 / 9600 / 19200 / 34800 Baud
Factory setting 9600 Baud
1
47