LI-COR LI-6400 - Using Status Information from an LPL Program

OPENÕs System Variables
Status Variables
Using the LI-6400 14-15
ID: -23 ÒCHPWMFÓ
This is a 6 digit numerical composite of the status flags.
To get just one component of this number (such as the water IRGA status) in
a Compute List or AutoProgram, use the LPL Function names given in the
table. Figure 14-1 illustrates a piece of LPL code that does one thing if the IR-
GAs are OK, and another if they are not.
Table 14-6. 6 digit status summary
Code
Letter
CH P WMF
Item
CO
2
IRGAs
H
2
O
IRGAs
Pump Flow Con-
trol
CO2
Mixer
Chamber
Fan
a
Possible
Values
1 OK 1 OK 0 Off 0 Off 0 Off 0 Off
2 errR 2 errR 1 OK 1 OK 1 OK 4 Slow
3 errS 3 errS 2 err 2 Low 2 Low 5 Fast
4 err 4 err 3 High 3 High
LPL
Function
StatusCO2 StatusH2O
StatusPump
b
IsPumpOn
StatusFlow StatusInj
chFanState
c
a.The value for F is the number of volts that the fan control DAC is set to. By default, 5 is fast and 4 is slow,
but this can be changed via the configuration command FanSlow=.
b.If 6400-01 Mixer is installed. Otherwise, use IsPumpOn.
c.An INT, nor a FCT.
StatusCO2 StatusH2O OR IF
/* Not ok */
...
ELSE
/* both ok */
...
THEN
Figure 14-1. Using status information from an LPL program.