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Salter Brecknell WB-521 Series User Manual

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SBI521 Service Manual

65

The data frame format from COM2 is:

Total 12 bytes are in a frame string. W1W2W3 is 24bits output raw counts from ADC
(Hex format), (ST) is status byte, is its high order 4 bits of XX and is its
lower order 4bits of XX

Status byte definition:

When Indicator is going to power off, it outputs following content to COM2:

"OFF"

6.5.4 Communication when USER-COM1/2-LAYOUT is set to 200S/200F:

Commands and response

Command:

W (57h 0dh) or P (50h 0dh), request current reading

Response:

The indicator will not respond if the scale is in motion, positive overload or negative
overload.

Figure 6.1 Set for 200S

Bit

STH

Bit

STL

4

0= in working

1=be going to power off

0

0= AD is not over

1=AD is ove

5

X

1

0= no AD error

1= AD error

6

0

2

0=not new data

1=new data

7

0

3

0=voltage is not low

1=voltage is low

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