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9.6.4
Compensation of runtime delays
In reality, both the input circuit in the servo inverter and the touch probe sensor have runtime
delays (latencies) themselves. These can be taken into account in the calculation of the real
trigger time and thus the real position at the trigger time.
In the following figure, the event is detected in the servo inverter at the time
②
. Due to the
input circuit and the sensor used, the signal runtime, however, has been delayed. The real
physical event has already occurred at time
①
. For compensating this runtime delay, you can
set a corresponding delay time for each touch probe channel that is included in the determi-
nation of the control cycle and interpolation of the position, see figure in chapter "
1
2
p
n-1
p
n-2
Position
t
Event received
Event
Delay time
p
n
"Delay time":
Delay time between the real physical event and the electrical detection.
①
Real physical event
②
Electrical detection of the event in the servo inverter
Delay times of the digital input and the required minimum signal duration
The following table lists the typical delay times and the required minimum signal durations for
the digital inputs of the servo inverter:
Digital signal
Typical delay time
Minimum signal duration
Rising edge (HIGH pulse)
4 µs
4 µs
Falling edge (LOW pulse)
4 µs
4 µs
Parameter
Address
Name / setting range / [default setting]
Info
0x2D00:001
Touch probe (TP) delay time: Touch probe 1 delay
time
0.000 ... [0.000] ... 7.000 ms
Setting of the delay time for touch probe 1.
0x2D00:002
Touch probe (TP) delay time: Touch probe 2 delay
time
0.000 ... [0.000] ... 7.000 ms
Setting of the delay time for touch probe 2.
0x2D00:003
Touch probe (TP) delay time: Touch probe 3 delay
time
0.000 ... [0.000] ... 7.000 ms
Setting of the delay time for touch probe 3.
0x2D00:004
Touch probe (TP) delay time: Touch probe 4 delay
time
0.000 ... [0.000] ... 7.000 ms
Setting of the delay time for touch probe 4.
Configure position control
Position detection with touch probe (TP)
Compensation of runtime delays
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