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APG MNU Slave Sensor user manual User Manual

Page 10

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MNU Series Ultrasonic Sensors

Rev. B1, 5/13

10

Automa! on Products Group, Inc.

APG...Providing tailored solu• ons for measurement applica• ons

Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]

• Sensor Communica! ons

The MNU sensor u! lizes standard Modbus RTU protocol (RS-485). The MNU
sensor can only operate as a slave device. For more informa! on about Modbus
RTU, please visit www.modbus.org.

The MNU sensor will transmit at (allow a minimum delay of 300 ms between
transac! ons):

9600 bps
8 data bits
No parity
1 stop bit

Input Registers (0x04):

Register

Returned Data

30300

Raw Distance/Level Reading (in mm, unsigned)

30302

Temperature Reading (in

0

C, signed)

30303-30304 Calculated Reading (in selected units, without decimal place)

NOTE: the Calculated Reading will be returned as a whole number. In order

to a" ain the true result, the Decimal Place se#

ng must be taken into ac-

count. Refer to Decimal Place se#

ng on page 21 for more informa! on.

Holding Registers (0x03):

Register

Func! on

Value Range

40400

Device Address

1 to 255

40401

Units

1 to 3

40402

Applica! on Type

0-10

40403

Volume Units

0 to 6

40404

Decimal Place

0 to 3

40405

Max Distance

0 to 10364 mm

40406

Full Distance

0 to 10364 mm

40407

Empty Distance

0 to 10364 mm

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