Lenze E94AxHE Servo Drives 9400 HighLine (Firmware 01-37) - Manual (Page 131)

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Firmware 1.37 - 09/2006 131
9400 HighLine | Parameter setting & configuration
I/O terminals
Touch probe detection
7.7.2 Dead time compensation
For dead time compensation during the detection of the touch probe event, it is possible to
select a delay time (touch probe delay) in C02810 for each touch probe channel, which will
be considered in the touch probe calculation.
[7-4] Dead time compensation (principle)
r Filtering of the digital inputs influences the electrical detection of the touch probe, i.e.
the DIx delay time set in C02830 for the digital inputs must be considered in the delay
time C02810 .
r For the optional digital frequency input/output the delay times must be set via special
parameters:
– C13021 or C14021: TP delay time - digital frequency input.
– C13061 or C14061: TP delay time - digital frequency output.
 Mechanical event: Switch is closed
 Electrical event: Closed switch contact is registered
• Can, e.g. be delayed by flying times of the mechanical contact or filter.
 Value and position determination for the real (mechanical) event, the determined values are transferred to
the application
n Delay time (dead time) between mechanical and electrical event
• This dead time can be compensated by a corresponding setting in C02810 .
o Time considered by touch probe calculation
• If more than one task cycle has passed, the history buffer finds the two actual position values between
which the physical event has occurred.
Data
processing
Application
Data
processing
Application
Data
processing
Application
Task cycle Task cycle Task cycle
t
Position
t 0 1 2
Œ
Delay time

Touch probe received