GMC-I Messtechnik GmbH
R2500–19
Controller Types
Controller Type
Applications
Measure (
Cout
=
MEAS
)
This configuration is intended for temperature monitoring.
Limit value monitoring can be configured. System deviation is not used for any other purposes.
Actuator (
Cout
=
POW
)
Same as
controller type 1
(
measure
)
In addition, the actuator manipulating factor is read out with the actuating cycle.
Limit transducer (
Cout
=
OnOF
)
The maximum manipulating factor is read out if the actual value is less than the momentary setpoint.
The minimum manipulating factor is read out if the actual value is greater than the momentary setpoint plus the
dead zone.
Switching hysteresis is adjustable, and status changes are possible after each actuating cycle.
Actuating cycle time is used as a time constant for an additional input filter.
PDPI controller and PDPI step-action
controller (
Cout
=
PdPI
)
The PDPI control algorithm assure short settling time without overshooting.
The actuating cycle is at least as long as the selected value.
The dead band inhibits switching back and forth between “heating” and “cooling” if no lasting deviation occurs.
Selection of these two
controller types
, namely
PDPI
and
PDPI step-action
controller, defines the controller
itself on the basis of the output configuration.
Proportional actuator
(
Cout
=
ProP
)
The control variable is proportional to system deviation, and a statistical dead zone can be adjusted at the
cooling side.
Actuating cycle time is used as a time constant for an additional input filter.
This controller type is not intended for temperature regulation, because it does not demonstrate the dynamics
required for control without overshooting.
Summary of Contents for R2500
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