LL[N] - Low Feedback Limit
Purpose:
Speed limits
The parameters LL[2] and HL[2] define the limits of the allowed motor speed. If the
motor speed exceeds HL[2] or is lower than LL[2], the drive is automatically disabled
and the “Speed High Limit” fault (MF=0x20,000) is activated Speed limits are
restricted by the TS value according to the following:
For analog encoder, resolver, tachometer, potentiometer and digital halls:
SpeedLimit = minimum between 80,000,000 and 8e9/TS.
For quadrature encoder:
SpeedLimit = minimum between 20,000,000 and 8e9/TS.
Position limits
LL[3] and HL[3] define the allowed motor position range for UM=3, 4 and 5. If the
motor position is smaller than LL[3] or larger than HL[3], the motor is automatically
disabled and the “Position High Limit” fault (MF=0x400000) is activated. In order to
re-enable the motor, modify the current position (PX) within the ranges of HL[3] and
LL[3].
Attributes: Type: Parameter, Integer
Source: Program, RS-232, CANopen
Restrictions: MO=0 and
For LL[2] and HL[2]: HL[2]>LL[2]
For LL[3] and HL[3]: HL[3] >LL[3]
Default values: LL[2]=-1,000,000
HL[2]=1,000,000
LL[3]=-15,000,000,000
HL[3]=15,000,000,000
(RS), Non-volatile
Range: LL[2]: Velocity range
HL[2]: Velocity range
-2
31
<LL[3] <2
31
– 1
-2
31
<HL[3] <2
31
– 1
Index range: [2, 3]
Unit modes: HL[2], LL[2]: UM=2, 3, 4, 5
HL[3], LL[3]: UM=3, 4, 5
Activation: Immediate
Note: The position counter is subject to a modulo count; refer to position counter
range.
See also:
VL[N], VH[N], MF, SR, MO, XM[N]
Reference chapter in The
SimplIQ Software Manual:
Chapter 14, ”Limits, Protections, Faults and Diagnosis”
SimplIQ Command Reference Manual Alphabetical Listing
MAN-SIMCR (Ver. 4.5)
3-84
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