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Siemens Building Technologies
SED2 variable speed drives
CM1U5192en
HVAC Products
Programming
01.2002
Unit: %
Min: -
Def: -
Max: -
Note:
r2250=100 % corresponds to 4000 hex.
P2253[2]
CI: PID setpoint
Defines setpoint source for PID setpoint input.
This parameter allows the user to select the source of the PID setpoint. Normally, a digital
setpoint is selected either using a fixed PID setpoint or an active setpoint.
Unit: -
Min: 0:0
Def: 2250:0
Max: 4000:0
Level 2
Details:
This parameter allows the user to select the source of the PID setpoint. Normally, a digital setpoint is selected either
using a fixed PID setpoint or an active setpoint.
Settings:
755= Analog input 1
2224 =Fixed PI setpoint (see P2201 to P2207)
2250 =Active PI setpoint (see P2240)
Index;
P2253[0] : 1st command data set (CDS)
P2253[1] : 2nd command data set (CDS)
P2254[2]
CI: PID trim source
Selects trim source for PID setpoint. This signal is multiplied by the trim gain and added to the
PID setpoint.
Unit: -
Min: 0:0
Def: 0:0
Max: 4000:0
Level 3
Details:
This parameter allows the user to select the source of the PID setpoint. Normally, a digital setpoint is selected either
using a fixed PID setpoint or an active setpoint.
Settings:
755= Analog input 1
2224 =Fixed PI setpoint (see P2201 to P2207)
2250 =Active PI setpoint (see P2240)
Index;
P2254[0] : 1st command data set (CDS)
P2254[1] : 2nd command data set (CDS)
P2261
PID setpoint filter time constant
Sets a time constant for smoothing the PID setpoint.
Unit: s
Min: 0.00
Def: 0.00
Max: 60.00
Level 3
Note:
0 = no smoothing.
r2262
CO: Filtered PID setp. after RFG
Displays filtered PID setpoint after PID-RFG in [%].
Unit: %
Min: -
Def: -
Max: -
Level 3
Details:
Displays filtered PID setpoint after PID-RFG in [%].
Note:
r2262=100 % corresponds to 4000 hex.
P2264[2]
CI: PID feedback
Selects the source of the PID feedback signal.
Unit: -
Min: 0:0
Def: 755:1
Max: 4000:0
Level 2
Settings:
755= Analog input 1 setpoint
2224 =Fixed PID setpoint
2250 =Output setpoint of PID-MOP
Index:
P2264[0] : 1st command data set (CDS)
P2264[1] : 2nd command data set (CDS)
Note:
When analog input is selected, offset and gain can be implemented using parameters P0756 to P0760.
P2265
PID feedback filter time constant
Defines time constant for PID feedback filter.
Unit: s
Min: 0.00
Def: 0.00
Max: 60.00
Level 3
P2267
Max. value for PID feedback
Sets the upper limit for the value of the feedback signal in [%].
Unit: %
Min: -200.00
Def: 100.00
Max: 200.00
Level 3
Note:
P2267=100 % corresponds to 4000 hex.
When PID is enabled (P2200=1) and the signal rises above this value, the variable speed drive will trip with P0222.
P2268
Min. value for PID feedback
Sets lower limit for value of feedback signal in [%].
Unit: %
Min: -200.00
Def: 0.00
Max: 200.00
Level 3
Note:
P2268=100 % corresponds to 4000 hex.
When PID is enabled (P2200=1) and the signal rises above this value, the variable speed drive will trip with P0221.
P2269
Gain applied to PID feedback
Allows the user to scale the PID feedback as a percentage value [%].
A gain of 100 % means that the feedback signal has not changed from its default value.
Unit: -
Min: 0.00
Def: 100.00
Max: 500.00
Level 3
Note:
Allows the user to scale the PID feedback as a percentage value [%].
A gain of 100.0 % means that feedback signal has not changed from its default value.
P2270
PID feedback function selector
Applies mathematical functions to the PID feedback signal, allowing multiplication of the result
by P2269 (gain applied to PID feedback).
Unit: -
Min: 0
Def: 0
Max: 3
Level 3
Details:
Applies mathematical functions to the PID feedback signal, allowing multiplication of the result by P2269 (gain applied to
PID feedback).
Settings:
0=Disabled
1=Square root (root(x))
2=Square
(x*x)
3=Cube
(x*x*x)
P2271
PID transducer type
Allows the user to select the transducer type for the PID feedback signal.
Unit: -
Min: 0
Def: 0
Max: 1
Level 3
Value:
0 : [default] If the feedback signal is less than the PID setpoint, the PID controller will increase motor speed to correct this.
1 : If the feedback signal is greater than the PID setpoint, the PID controller will reduce motor speed to correct this.
Settings:
0=Disabled
1=Inversion of PID feedback signal
