Teledyne 7600 - Infrared gas analyzer - communication manual - Manual (Page 17)

Teledyne Analytical Instruments
17
(3) Message transmission (example)
The following shows an example of reading out from No. 1 station the setting CH2 (2nd
component) range-1 zero and span calibration concentration.
Relative address of CH2 range-1 zero calibration concentration setting: 0004
H
Data number: 02
H
Command message composition (byte)
Response message composition (byte)
Station No. 01
H
Station No. 01
H
Function code 03
H
Function code 03
H
Read-out byte number 04
H
Upper 00
H
Upper 00
H
Read-out start No.
(relative address)
Lower 04
H
Contents of the
first word data
Lower 00
H
Upper 00
H
Upper 03
H
Read-out word
number
Lower 02
H
Contents of the
next word data
Lower E8
H
Lower 85
H
Lower FA
H
CRC data
Upper CA
H
CRC data
Upper 8D
H
* Meaning of read-out data
CH2 range-1 zero calibration concentration setting 00 00
H
= 0
(contents of first word data)
CH2 range-1 span calibration concentration setting 03 E8
H
= 1000
(contents of next word data)
Provided decimal point position = 1, measurement unit = 1,
CH2 range-1 zero calibration concentration = 0.0 ppm
CH2 range-1 span calibration concentration =100.0 ppm
*For handling of the decimal point and unit, refer to Section 7.1.