Description of the individual parameters

Controller parameters
Portrayed in LOGO!
Possible value range in the LOGO!
Mn
Manipulated variable at the time n
Output of the PI controller block
0 to 1,000
kP
Gain of the P part
kI
Gain of the I part
In the LOGO!, the parameter KC applies as an increase for the I part and the P part of the controller equally
Should you enter KC=0, then the P part of the controller switches off. In this special case, k is automatically set to 1 for the I part.
If KC = 0: kP = 0 and kI = 1
If KC <> 0: kP = kI = KC
0.00 to 99.99
T_S
Sampling time, duration of a time slice
Fixed
500 ms
T_I
Integral time
Parameter T_I: if you set this parameter to 99.59 min, then you switch off the I part of the controller.
00:01 min to 99.59 min
e_n
Loop error at the time n; generally applies:
E = SP - PV
Refer to SP and PV
"
SP
The parameter SP is the set-value assignment w. For this parameter you can use the analog output of a different special function.
-10,000 to +20,000
PV
PV is the process value x and is calculated as follows:
PV = analog value on input * gain) + offset.
You can connect the input for example by means of an analog input with a PT100 sensor.
"
The gain parameter has an effect on PV
0.0 to 10.0
The offset parameter has an effect on PV
-10,000 to +20,000
PV is restricted by the parameters Min. and Max.
In each case: 10,000 to +20,000
The Dir parameter gives the action direction of the controller.
Positive means: If set value > process value then the process value is increased; if set value < process value then the process value is reduced.
Negative means: If set value > process value then the process value is reduced; if set value < process value then the process value is increased.
Example, heat regulation: if the set value is greater than the process value (room is too cold), the manipulated variable increases the process value.
- or +

Controller parameters	Portrayed in LOGO!	Possible value range in the LOGO!
Mn Manipulated variable at the time n	Output of the PI controller block	0 to 1,000
kP Gain of the P part kI Gain of the I part	In the LOGO!, the parameter KC applies as an increase for the I part and the P part of the controller equally Should you enter KC=0, then the P part of the controller switches off. In this special case, k is automatically set to 1 for the I part. If KC = 0: kP = 0 and kI = 1 If KC <> 0: kP = kI = KC	0.00 to 99.99
T_S Sampling time, duration of a time slice	Fixed	500 ms
T_I Integral time	Parameter T_I: if you set this parameter to 99.59 min, then you switch off the I part of the controller.	00:01 min to 99.59 min
e_n Loop error at the time n; generally applies: E = SP - PV	Refer to SP and PV	"
SP	The parameter SP is the set-value assignment w. For this parameter you can use the analog output of a different special function.	-10,000 to +20,000
PV	PV is the process value x and is calculated as follows: PV = analog value on input * gain) + offset. You can connect the input for example by means of an analog input with a PT100 sensor.	"
	The gain parameter has an effect on PV	0.0 to 10.0
	The offset parameter has an effect on PV	-10,000 to +20,000
	PV is restricted by the parameters Min. and Max.	In each case: 10,000 to +20,000
	The Dir parameter gives the action direction of the controller. Positive means: If set value > process value then the process value is increased; if set value < process value then the process value is reduced. Negative means: If set value > process value then the process value is reduced; if set value < process value then the process value is increased. Example, heat regulation: if the set value is greater than the process value (room is too cold), the manipulated variable increases the process value.	- or +

Refer to the PI controllers - description of special function for more details (for example, switching from manual to automatic mode, parameter sets, etc.).