User manual - CONTROLLER PUR-49D
There are 3 auto-tuning modes available, as a result of which the settings of one of the
controllers will be selected:
The
At-F
mode:
Auto-tuning using both the controller’s control loops (
At-F
mode), during which two
outputs of the device can be controlled. In this process, the device determines (based on the
setpoint and the measured value), which loop is to be tuned. The second loop receives the
same settings. When the setpoint is greater than the measured value, the
PID-H
controller’s
loop will be tuned, and when the setpoint is less than the measured value, the
PID-C
controller’s loop will be tuned.
The process of auto-tuning in this mode may commence subject to the following
conditions:
1) The value measured by the device must be greater than six fifths (120%) of the
setpoint (when the
PID-H
controller is tuned) or the value measured by the device must
be greater than six fifths (120%) of the setpoint (when the
PID-C
controller will be tuned)
2) The source of at least one of the device’s outputs must be
PidH
if the loop of the
PID-H
controller will be tuned, or the source of at least one of the outputs must be
PidC
,
if the loop of the
PID-C
controller will be tuned. In addition, these outputs can not be set
in the
noAC
mode.
First auto-tuning should be made in
At-F
mode, because otherwise, the regulator can
work inappropriately. When first
At-F
auto-tuning is done, the user can ajdust
regulator's settings according to his needs or execute any auto-tuning mode.
The
At-H
mode:
Auto-tuning of the
PID-H
loop (the
At-H
mode), during which the device uses and adjusts
only that loop. The second loop remains idle and its setting will not change following the
process.
The process of auto-tuning in this mode may commence subject to the following conditions:
1) The value measured by the device must be less than four-fifths of the setpoint,
2) The source of at least one of the device’s outputs must be
Pid-H
. Additionally, those
outputs cannot be set in the
noAC
mode.
The
At-C
mode:
Auto-tuning of the
PID-C
loop (the
At-C
mode), during which the device uses and adjusts
only that loop. The second loop remains idle and its setting will not change following the
process.
The process of auto-tuning in this mode may commence subject to the following conditions:
1) The value measured by the device must be greater than six fifths of the setpoint
2) The source of at least one of the device’s outputs must be
PID-C
. Additionally, those
outputs cannot be set in the
noAC
mode.
Auto-tuning that is already underway is a very sensitive process. So the user should pay
attention to events that could interrupt the tuning of the settings. These events include:
1) Loss of power to the device.
2) Time for auto-tuning exceeded (24 h).
3) When the PID controller’s operating mode is switched over.
4) Measurement error (e.g. sensor failure).
5) Change in the parameters of the device.
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Содержание PUR-49D
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