User's Manual

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The Information contained in this document shall remain the sole exclusive property of s.m.s, smart microwave sensors GmbH and shall not
be disclosed by the recipient to third parties without prior consent of s.m.s, smart microwave sensors GmbH in writing.
UMRR-11 Type 132 User Manual_V2.docx Version 2 I Page 12 of 17 I January 10, 2019
Figure 7-1: CAN bit timing for UMRR sensor
Figure 7-2: CAN bit timing as defined by the CAN protocol
7.3 RS-485 data interface
The RS-485 interface from the UMRR sensor has a predefined speed of 115200 baud/s.
Typical other data rates are between 921.6kBit/s and 56.7kBit/s.
The RS-485 message payload is identical to the CAN format. The data messages will be sent
in several packets of one byte.
Every cycle begins with a start sequence and ends with a calculated checksum and an end
sequence. The length of the data payload depends on the number of targets and tracked
objects.
Every cycle has one start sequence one end sequence and one checksum.