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SPX advanced – description of parameters
SPX ADVANCED APPLICATION MANUAL
SVCH0203—October 2017 www.eaton.com
Code
ID
Parameter
Notes
P1.2.9.5
1246
Torque reference dead zone “TorqRefDeadZone”
The small values of the torque reference around zero can be ignored by setting this
value greater than zero. When reference is between zero to plus/minus this parameter,
the reference is forced to zero.
P1.2.9.6
1278
Torque select “torque select”
This parameter defines the speed limiting mode in torque control mode. This parameter
can be used as single motor control mode selection when no change is made between
open loop and closed loop controls.
0= “SpeedControl” - Speed control mode
The drive is forced to operate in speed control mode while the motor control mode
parameter is set to torque control mode thus allowing selection of speed control and
torque control mode with single parameter e.g. from Fieldbus.
1=”MaxFreqLimit” - Positive and negative frequency limits
Speed is not limited by speed reference, only maximum frequency or Positive and
Negative frequency limit if set lower than maximum frequency parameter.
P
Pos Freq Limit
Speed
[RPM]
Speed controller active
Speed controller active
Drive in Torque Control
Drive in Torque Control
Time
P
Neg Freq Limit
2=”RampOutput” – Ramp output for both directions
Speed is limited by reference after ramp generator, thus speed will increase with set
ramp time until actual torque is equal to reference torque. If speed is below reference
when load is removed from the shaft the speed will increase without ramp.
This is the default selection. For master follower system it is recommended to use
selection that allows a little higher reference for torque follower that load will be
balanced equally e.g. window control.
- T max
-100 %
-10 %
+10 %
+100 %
Dead Zone
10 %
T max
Reference
Speed
[RPM]
Speed controller active
Speed controller active
Drive in Torque Control
Drive in Torque Control
P
FW
Post Freq Limit
FreqRampOut
R
FreqRampOut
P
Neg Speed Limit
Ramp Generator Out
t