Lenze SimpleServo 94, User Manual

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6.5.5 Analog input dead band
Allows you to set voltage window (in mV) in such manner that any voltage value in that
window will be treated as zero. This is useful if your system zero voltage drifts making
drive shaft drift when commanded to zero.
6.5.6 Adjust analog voltage offset
This control button is useful to allow the drive to automatically adjust offset. To use it
set system output to zero and click this button. Any offset voltage at the analog input
will be adjusted out and the adjustment value will be stored in the drive’s memory.
6.6 Digital I/O
6.6.1 Programmable digital input
SimpleServo has 1 programmable digital output that can be assigned as follows:
•
N/A
Input not assigned and has no effect on drive operation.
• External Fault Input serves as external fault input. Servo will stop and indicate
fault if this input is activated.
•
Stop
In velocity or current mode sets input reference to 0 regardless
of voltage on analog input.
•
Reverse
Sign of input reference voltage is reversed.
6.6.2 Programmable digital output 1 and 2
Simple Servo has two digital outputs that can be separately assigned for the following
functions.
•
Not assigned
No function has been assigned for digital output
• Zero Speed Motor is at zero speed threshold set by ZERO SPEED
parameters in Velocity Limits Group
•
In Speed Window
Motor shaft RPM is within specified speed window as specified
in Velocity Limits Group.
•
Current Limit
Drive current output has exceeded the limit established by the
CURRENT LIMIT setting in the Drive Parameters dialog box.
• Run Time Fault A fault has occurred. Refer to Section 7.3 for details on faults.
•
Current limit
Motor has reached maximum current as set by current limit
parameter
6.6.3 Digital input polarity
Parameter sets logic polarity for digital input: active low or active high.
Note
If input is left floating (not connected) its state is “LOW”.
6.6.4 Digital output 1 (2) polarity
Parameter sets polarity - N.C or N.O - of the digital output 1 (2).
6.6.5 Digital input de-bounce time
Sets de-bounce for the digital input to anticipate switch or relay contacts bouncing if
they are used to compute input.