![background image](http://html1.mh-extra.com/html/omega/cl551/cl551_user-manual_4009073023.webp)
Second Setpoint
2
Ramp gradient
3
Resolution : 0.01° / 0.1°
4
Proportional band
5
Integral time
6
Derivative time
7
Pt100 : Internal / External
8
Engineering unit °C / °F
10
Default Parameters : ON/OFF 11
Key 12
Access Key
13
Baud Rate
14
Address 15
Switch ON value
22
Switch OFF value
23
Memory release
24
Actual temperature
100
9.3
Setting a variable
The instruction to write a variable has to be an ASCII code composed as follows :
$ character
Instrument Address
WVAR request string
Variable Index
Blank space
Value to be written
Carriage Return
For example, if the set point has to be set ( Variable index = 0 ) to 123 °C , supposing the instrument address to be 1:
$1WVAR0 123\r
ASCII
code $ 1 W V A R 0 1 2 3 \r
HEX
$
code 24 31 57 56 41 52 30 20 31 32 33 0D
The answer of the
CL551
will be as follows :
* character
Carriage return
* character
Instrument Address
Answer string
Carriage Return
ASCII
code * \r W V A R 0 1 2 3 \r
HEX
$
code 2A 0D 57 56 41 52 30 20 31 32 33 0D
For example, if the resolution has to be changed to 0.01° ( Variable index = 4 ) , supposing the instrument address to be
1:
$1WVAR4 1\r
ASCII
code $ 1 W V A R 4 1 \r
HEX
$
code 24 31 57 56 41 52 34 20 31 0D
The answer of the
CL551
will be as follows :
* character
Carriage return
* character
Instrument Address
Answer string
Carriage Return
ASCII
code * \r W V A R 4 1 \r
HEX
$
code 2A 0D 57 56 41 52 34 20 31 0D
23