Super Systems AC20 - Manual (Page 91)

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Secondary output cycle time Secondary output cycle time Secondary output cycle time Secondary output cycle time Secondary output cycle time: from 1 second to 200
seconds.
Relative secondary output gain
Relative secondary output gain Relative secondary output gain Relative secondary output gain Relative secondary output gain: keyboard programmable
from 0.20 to 2.00 referred to the proportional band.
Overlap / dead band
Overlap / dead band Overlap / dead band Overlap / dead band Overlap / dead band : keyboard programmable from - 20 %
(dead band) to + 50 % (overlap) of the proportional band.
Output limiters
Output limiters Output limiters Output limiters Output limiters.
For the main and/or secondary control outputs it is possible to
set:
- output high limits
- output low limits
- output max. rate of rise.
AUTO/MANUAL mode
AUTO/MANUAL mode AUTO/MANUAL mode AUTO/MANUAL mode AUTO/MANUAL mode: selectable by front push-button or
logic input.
CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS
Algorithm
Algorithm Algorithm Algorithm Algorithm: PID + SMART
Types:
Types: Types: Types: Types:
- one control output (digital or analog output)
- two control outputs
NOTE
NOTE NOTE NOTE NOTE: the outputs can be freely selected between analog and
digital outputs.
Digital output types Digital output types Digital output types Digital output types Digital output types: Relay or SSR.
Digital output action type
Digital output action type Digital output action type Digital output action type Digital output action type: Proportional time
Analog output types
Analog output types Analog output types Analog output types Analog output types: 20 mA.
Proportional Band
Proportional Band Proportional Band Proportional Band Proportional Band: programmable from 0.5% to 999.0% of
the input span.
Setting a PB equal to 0 the control action becomes ON/OFF.
Hysteresis (for ON/OFF control action)
Hysteresis (for ON/OFF control action) Hysteresis (for ON/OFF control action) Hysteresis (for ON/OFF control action) Hysteresis (for ON/OFF control action): programmable
from 0.1% to 10.0 % of the input span.
Integral time
Integral time Integral time Integral time Integral time: programmable from 1 second to 20 minutes or
excluded.
Derivative time
Derivative time Derivative time Derivative time Derivative time: programmable from 1 second to 10 minutes
or excluded.
Integral pre-load
Integral pre-load Integral pre-load Integral pre-load Integral pre-load: programmable
- for one control output, from 0 to 100% of the output range.
- for two control outputs, from -100 % to +100 % of the output
range.
Anti reset windup Anti reset windup Anti reset windup Anti reset windup Anti reset windup: from 10 % to 200 % of the input span.
Main output cycle time
Main output cycle time Main output cycle time Main output cycle time Main output cycle time: from 1 second to 200 seconds.