Hanna Instruments HI520 - Page 100

Control Modes & Algorithms 100
PID Control Interaction with Controller Status
Function / Mode
Control
Output
PID
Calculations
Relay Assigned
to Set Point
Control Output
Analog Output Assigned to
Set Point Control Output
Hold
Measure
0 or 100 % "On"
from
Control Period
On
"On" for time
control output
is On
Scaled value of control output
in mA
Start up 0 % Freeze Off Scaled value of control output
Hold 0 %
Reset to 0
and freeze
Off
Scaled value of last control output
or a fixed value of control output
Alarm 0 %
Reset to 0
and freeze
Off
Scaled value of last control output
or 22 mA, if option configured
Cleaning 0 % Freeze Off
Scaled value of last control output
or a fixed value of control output
Edit 0 %
Reset to 0
and freeze
Off
Scaled value of last control output
or a fixed value of control output
Calibration 0 %
Reset to 0
and freeze
Off
Scaled value of last control output
or a fixed value of control output
Manual 0 %
Reset to 0
and freeze
On or Off Any value in 0 to 22 mA range
Error 0 %
Reset to 0
and freeze
Off Scaled value of control output