8017035/ZMO9/2017-06-08 • © SICK AG • Subject to change without notice.
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Serial Communication
8 Serial Communication
8.1
Communication Specifications
8.1.1
Communication Specifications
Communication method
EIA RS-485 (half duplex)
Transmission code
Binary
Data length
8 bits
Stop length
1 bit
Parity check
None
Baud rate
9600, 19.2 k, 38.4 k, 57.6 k, 115 k, 230 k, 460 k, 921 k, 2.0 M, 4.0 M (bps)
Header
STX
Data delimiter
ETX
Use a dedicated communication cable to perform communication.
8.1.2
Timing Chart During Communication
During communication, the timing chart is shown below.
min 204µs
max 2 sec.
Command
Send
Command
Reply
(Profiler 2)
• Collision detection is not performed (P to P connections only).
• The baud rate can only be changed by operating the sensor. It cannot
be changed by way of communication commands or PRO2-Navigator.
• A time-out will occur if the send time of the command exceeds
2 seconds.
• Response time to the command varies depends on the baud rate.
Baud rate
9600bps
19200bps
38400bps ~
Response time
1.8ms (fixed)
1ms (fixed)
204μs ~
