Parameters U511 User’s Manual
4-80 Aerotech, Inc. Version 1.1
4.10.9. “Amplifier fault active low” (y/n)
Parameter x70 specifies the polarity of the drive amplifier fault signal input to the
UNIDEX 511. This parameter must be configured to correspond to the input signal in its
inactive state.
In a normally open (active low) configuration (x70 = yes), a 5 volt signal represents a
normal (non-fault) condition and a 0 volt signal indicates a drive fault condition.
Conversely, in a normally closed (active high) configuration (x70 = no), a 0 volt signal
represents a normal (non-fault) condition and a 5 volt signal indicates a drive fault
condition. The settings for parameter x70 are shown in Table 4-61.
Table 4-61. Settings for Parameter x70
Param # Axis # Values Description
170 1
Yes (Y)
Drive fault signal is active low (default)
No (N) Drive fault signal is active high
270 2
Yes (Y)
Drive fault signal is active low (default)
No (N) Drive fault signal is active high
370 3
Yes (Y)
Drive fault signal is active low (default)
No (N) Drive fault signal is active high
470 4
Yes (Y)
Drive fault signal is active low (default)
No (N) Drive fault signal is active high
x70
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