700-SDI-RADAR-300W-Man Rev 2 30 May 2022
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Part# 21370
Set device ID:
Configure the device ID. The ID is used as device identifier for RS-485 protocol.
#set_can_id=<0-99>
Automatic angle compensation:
Enable/ disable the automatic compensation (cosine-
correction) of the tilt angle on the reported flow measurement.
#set_angle_compensation=<0-1>
0 = enable
1 = disable
Retrieve current device status:
Requests the current device status.
#get_info
Example status output:
# firmware:4.3.12
# pga_gain:2
# units:mph
# thld:64
# direction:both
# baud_rate:9600
# can_id:2
# angle_compensation:1
# filter_enable:1
# filter_type:1
# filter_len:5
# sensor_rotation:0
4.2.3
REQUEST-RESPONSE PROTOCOL (RS-485)
A different data protocol is used on the RS-485 interface which allows the connection of multiple
units on a single RS-485 line. Before the units are connected on the single RS-485 bus, each unit
must be configured with a different device identifier. The device identifier is configured by using the
PC Configurator Utility. Refer to Chapter 4 for instructions.
The request-response protocol, unlike NMEA protocol, does not automatically report periodic flow
measurement readings. Instead, when the unit is polled from the data logger, it responds with the
current averaged flow velocity measurement.
The request is sent from the data logger to the flow meter:
<0x25> ID CSUM
0x25: The first byte sent in the request is % character. Its ASCII value in HEX is 0x25.
ID: Exactly two bytes long. This is the unit ID written as two ASCII characters.
For example, if the polled unit ID is 2, then ID will be sent as “02”. In HEX
representation it is the following two bytes: <0x30><0x32>.
