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PID parameters:-
Code “K”
controller sends string
Code “k”
controller receive string
Protocol from computer
“ L3K” request for data
“ L3k” + string of data
Data string 22 characters long
[9990]
cycle time
99.90 seconds
[99]
hystereses
99 degrees
[77]
PID zone enable
0111 0111
[9999]
proportional band
9999 degrees
[0999]
reset
9.99
[9999]
rate
99.99
[77]
Cooling zone enable
0111 0111
Set for Autotune:-
Code “S”
controller sends string
Code “s”
controller receive string
Protocol from computer
“ L3S” request for data (8 ch)
“ L3s” + string of data (6 ch)
Data string send 8 characters long ; receive 6 characters long
[06]
zone for Autotune
[1 to 6]
[9999]
autotune setpoint
[61]
run mode [00, 51, 52, 61, .... “S” send only ]
Start Autotune:-
Code “G”
controller receive command
Protocol from computer
“ L3G” Start command
Stop Autotune:-
Code “H”
controller receive command
Protocol from computer
“ L3H” Stop command
Notes:-
1.
All data sent to the controller must be decimal (ASCII format).
2.
All data sent to the controller and code “G & H” are echoed
back to the computer.
3.
Any non decimal character in the data stream will terminate
reception, and data received to that point will be ignored.
11
12
To enable Data Logging click on the Datalogger box.
2.4 RS-232 PC Screens
Six examples of program screens are shown below.
Содержание CN616TC1
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