BTU XT Micro, Руководство пользователя

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XT-Micro Control Panel 13
(Programmable Parameter)
The PID values control the ways that the fresh air doors and refrigeration control tem-
perature. Press the right key to access the PID values for cooling and refrigeration.
Program
PID Values
Cool P 50*
Cool I 10*
Cool D 20*
Cool U 4.0*
Ref P 20*
Ref I 4*
Filter 6*
(Programmable Parameter)
Cool P (Cooling proportional gain) The default value is 30, increasing this value will
cause the overall system performance to be come faster. P is most effective on sudden
changes.
Cool I (Cooling integral gain) The default value is 8. The integral gain produces an error
based on small errors over time. Increasing this value will cause the small error to be
amplified over time and the system to be more sensitive to static errors.
(Programmable Parameter)
Cool D (Cooling derivative gain) The derivative is produced by a sudden change in the
error. If the temperature is several degrees above setpoint, the PID will ramp quickly.
The error may not change much until the door reaches a given position. At this point the
temperature would drop quickly. The derivative acts like a brake and will offset the error
when large changes are being made. If the temperature over shoots at start up, you
would want to increase the Derivative. The default setting is 20.
Cool U (Cooling update time) This value is in 1/10’s of a second and determines when
the PID loop is updated. The default value is 100. Increasing this value will slow down
the entire loop, decreasing will cause the loop and response to speed up.
(Programmable Parameter)
Ref P (Refrigeration proportional gain) The default value is 20, increasing this value will
cause the overall refrigeration system performance to be come faster. P is most effective
on sudden changes.
Ref I (Refrigeration integral gain) The default value is 4. The integral gain produces an
error based on small errors over time. Increasing this value will cause the small error to
be amplified over time and the system to be more sensitive to static errors.
Ref D 10*
Ref U 10.0*
(Programmable Parameter)
Ref D (Refrigeration derivative gain) The derivative is produced by a sudden change in
the error. If the temperature is several degrees above setpoint, the PID will ramp quickly.
The error may not change much until the refrigeration reaches a given position. At this
point the temperature would drop quickly. The derivative acts like a brake and will offset
the error when large changes are being made. If the temperature over shoots at start up,
you would want to increase the Derivative. The default setting is 20.
Ref U (Refrigeration update time) This value is in 1/10’s of a second and determines
when the PID loop is updated. The default value is 100. Increasing this value will slow
down the entire loop, decreasing will cause the loop and response to speed up.
(Programmable Parameter)
The filter is a vale from 1 to 10. This number will weight the analog values for all the tem-
peratures, humidity and CO2 readings. The default value is 6, increasing this value will
cause the readings to be more highly filtered and slower to change.