Teledyne 7600 - Infrared gas analyzer - communication manual - Manual (Page 19)

Teledyne Analytical Instruments
19
(3) Message transmission (example)
The following shows an example of reading out from No. 1 station the setting CH5
measurement concentration, decimal point position and measuring unit.
Relative address of CH5 measurement concentration setting: 000C
H
Data number: 03
H
Command message composition (byte)
Response message composition (byte)
Station No. 01
H
Station No. 01
H
Function code 04
H
Function code 03
H
Read-out byte number 04
H
Upper 00
H
Upper 00
H
Read-out start No.
(relative address)
Lower 0C
H
Contents of the
first word data
Lower 00
H
Upper 00
H
Upper 03
H
Read-out word
number
Lower 03
H
Contents of the
next word data
Lower E8
H
Lower 70
H
Upper 00
H
CRC data
Upper 08
H
Contents of the
last word data
Lower 00
H
Lower 81
H
CRC data
Upper 0D
H
* Meaning of read-out data
First word data contents 04 0D
H
= 1200
Next word data contents 00 02
H
= 2 (decimal point position)
Latest word data contents 00 00D
H
= 0 (vol %)
In the above case, measurement concentration = 12.00 vol%
*For handling of the decimal point and unit, refer to Section 7.1.