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INFRASCAN3100
5.
29
Manual
OUTPUTS, EVALUATION
5.1 Serial Interface with UART
This interface allows for the connection between scanner and controllers with an RS422 port
or – if a Remote Access Kit converter cable is used - an RS232C port (e.g. PC interface ).
Signal
Cable
RxD
/RxD
TxD
/TxD
+24 V
GND
White
Brown
Green
Yellow
Pink
Grey
Die UART interface comprises two TxD and RxD signal lines:
Interface protocol:
Baudrate [Bd]:
Number of data bits:
Number of stopbits:
Parity:
9600/19200/38400
8
1
even
The command set of the INFRASCAN31.. measuring system is not only suitable for data
transmission; it can also be used for configuring the receiver. It is worth emphasizing that
simultaneous operation of the serial and (if provided) the parallel interface is possible.
5.1.1 Message Format and Timing
Communication is always initiated by the connected controller. At the same time, the first
byte to be transmitted is always a command. If this command is recognized as "valid", it is
confirmed by the receiver, which returns the same code (ECHO).
TxD
S0 1 2 3 4 5 6 7 PS
Control
Data byte
Command
Rx
Control




8


Byte transfer time (at 38,4kBaud):
Time delay:
Waiting time for subsequent data (command):
290 µs
max..1500 µs8
max. 50 ms
For commands write_transmitter_gain and write_special delay is up to 50 ms.
Sitronic