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Reference material
5.3 Special functions
LOGO!Soft Comfort Online Help
326 Operating Instructions, 11/2017
Refer to the PI controllers - description of special function for more details (for example,
switching from manual to automatic mode, parameter sets, etc.).
5.3.5.4
PI controller
Short description
A PI controller is a proportional-action and integral-action controller. You can use both
proportional action and integral action individually or combined.
Connection
Description
Input
A/M
Set the mode of the controller:
1: automatic mode
0: manual mode
Input
R
Use the input R to reset the output AQ. As long as this input is set, the input A/M
is disabled. The output AQ is set to 0.
Input PV
Analog value: process value, influences the output
Parameter Sensor: Type of sensor being used
Min.:
Minimum value for PV
Value range: -10,000 to +20,000
Max.:
Maximum value for PV
Value range: -10,000 to +20,000
Gain
Value range: -10.00 to +10.00
Offset
Value range: -10,000 to +10,000
SP:
Set-value assignment
Value range: -10,000 to +20,000
Mq:
Value from AQ with manual mode.
Value range: 0 to 1,000
Parameter sets:
application-related presets for KC, TI and Dir (see below)
KC:
Gain
Value range: 00.00 to 99.99
TI:
Integral time
Value range 00:01 min to 99:59 min
Dir:
Action direction of the controller
Possible settings: + or -
p:
Number of decimal places
Possible settings: 0, 1, 2, 3
Output
AQ
Analog output (manipulated variable)
Value range for AQ: 0 to 1,000
326


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