338
Manual – IPOSplus®
23
Set commands
Assembler – Commands
RELATED TORQUE Relative torque/relative torque VFC.
The relative torque is the display value based on the rated unit current for the
torque at the motor output shaft. The absolute torque can be calculated from this
value using the following formula:
M
abs
= M
rel
× I
N
× M
N
/ (1000 × I
QN
)
M
abs
= absolute torque
I
N
= Rated unit current
M
rel
= relative torque based on 0.1% I
N
M
N
= Rated torque of the motor [Nm]
I
QN
= Rated Q current [A] for selected connection type. The value is available in
the operating modes CFC and SERVO / VFC1, VFC1 & hoist, VFC1 & DC braking
and VFC1 & flying start.
REL. TORQUE VFC
ACT. SPEED EXT. Actual speed of the external encoder X14. The following data structure is used:
H Time Base 5 ms ... 31 ms: Mean value for speed detection of external encoder.
H+1 Encoder type
0 = Encoder X14
1 = DIP encoder
H+2 Numerator -2
15
... 0 ... + 2
15
-1: Numerator for user scaling.
H+3 Denominator 1 ... 2
15
-1: Denominator for user scaling.
H+4 D-Pointer 0 ... 458: Pointer to result variable H".
H' Result unit: [nX14] = Inc/Time base.
Example: The speed of the master encoder is to be displayed in arcs per hour. With an
average value filter of 30 ms and encoder X14, the arcs per hour are calculated as fol-
lows:
11250 / 384 = (1000 ms × 60 s × 60 min) / (Incr. per full load revolution × TimeBase)
The minus sign at H32 causes the direction of rotation to be reversed.
SET H30 = 30
SET H31 = 0
SET H32 = -11250
SET H33 = 384
SET H34 = 40
GETSYS H30 = ACT.SPEED EXT.
SPEED MON. TIMER Numerator value of the speed monitoring.
The GETSYS command can be used as a prewarning for speed monitoring. Speed
monitoring is triggered when the current is at the current limit for the number of
seconds specified in P501. For example, if P501 = 200 ms, the numerator value
can be queried with GETSYS. In this way, return travel can be made at rapid
speed and, when under load, the speed can be reduced automatically by the
inverter.
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