Hach si792 D series, User Manual

Page: 51 / 96

Operation—Foundation Fieldbus
49
6.2.2 Standard analog input block (AI)
Three Analog Input Function Blocks provide for cyclic transmission of
measured values (currently measured value with status, alarm limits,
freely selectable process parameter).
6.2.2.1 Operating modes
Use the MODE_BLK parameter to set the following operating modes:
• OOS—out of service. If not write-protected, access to all
parameters is allowed.
• MAN—manual
• Auto—online, normal state
6.2.2.2 Set the parameter and units
Use CHANNEL to set the measured parameter and units (
Table 15
).
The corresponding measurement unit is selected in the UNITS
subparameter of XD_SCALE (
Table 16 on page 51
).
Table 15 Measurement parameters and units
Channel Parameter Unit Unit value
1 Saturation % (percent) 1342
2 Concentration
mg/l 2001
 g/l 2002
ppm 1423
ppb 1424
3 Temperature
°C 1001
°F 1002
4 Zero A 2003
5 Slope A 1587
6
Volume
concentration
% percent 1342
ppm 1423