HMR2300

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DATA FORMATS

The HMR2300 transmits each X, Y, and Z axis as a 16-bit value. The output data format can be either 16-bit signed binary

(sign plus 15 bits) or a binary coded decimal (BCD) ASCII characters. The command *ddA will select the ASCII format

and *ddB will select the binary format.

The order of ouput for the binary format is Xhi, Xlo, Yhi, Ylo, Zhi, Zlo. The binary format is more efficient for a computer to

interpret since only 7 bytes are transmitted. The BCD ASCII format is easiest for user interpretation but requires 28 bytes

per reading. There are limitations on the output sample rate (see table below) based on the format and baud rate

selected. Examples of both binary and BCD ASCII outputs are shown below for field values between 2 gauss.

Field

(gauss)

BCD ASCII

Value

Binary Value (Hex)

High Byte

Low Byte

+2.0

30,000

75

30

+1.5

22,500

57

E4

+1.0

15,000

3A

98

+0.5

7,500

1D

4C

0.0

00

00

00

-0.5

-7,500

E2

B4

-1.0

-15,000

C3

74

-1.5

-22,500

A8

1C

-2.0

-30,000

8A

D0

Binary Format: 7 Bytes

<cr> = Carriage Return (Enter key), Hex Code = 0D

ASCII Format: 28 Bytes

SN | X1 | X2 | CM | X3 | X4 | X5 | SP | SP | SN | Y1 | Y2 | CM | Y3 | Y4 | Y5 | SP | SP | SN | Z1 | Z2 | CM | Z3 | Z4 | Z5 | SP

| SP |<cr>

The ASCII characters will be readable on a monitor as sign decimal numbers. This format is best when the user is

interpreting the readings.

PARAMETER SELECTION VERSUS OUTPUT SAMPLE RATE

Sample

Rate

(sps)

ASCII

Binary

(Hz)

Notch

(Hz)

Command Input

Rate

– min.

(msec)

9600

19,200

9600

19,200

10

yes

yes

yes

yes

17

50/60

20

20

yes

yes

yes

yes

17

50/60

20

25

yes

yes

yes

yes

21

63/75

16

30

yes

yes

yes

yes

26

75/90

14

40

no

yes

yes

yes

34

100/120

10

50

no

yes

yes

yes

42

125/150

8

60

no

no

yes

yes

51

150/180

7

100

no

no

yes

yes

85

250/300

4

123

no

no

no

yes

104

308/369

3.5

154

no

no

no

yes

131

385/462

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