Lenze S94P01B2 - Manual (Page 43)

S94P01B2
41
Parameters
5.5.2 Analog Output Current Scale (Volt / amps)
Applies scaling to all functions representing CURRENT values.
5.5.3 Analog Output Velocity Scale (mV/RPM)
Applies scaling to all functions representing VELOCITY values. (Note: that mV/RPM
scaling units are numerically equivalent to volts/kRPM).
5.5.4 Analog Input Dead Band
Allows the setting of a voltage window (in mV) at the reference input AIN1+ and
AIN1- (P3.24 and 25) such that any voltage within that window will be treated as zero
volts. This is useful if the analog input voltage drifts resulting in motor rotation when
commanded to zero.
5.5.5 Analog Input Offset Parameter
Allows you to adjust the offset voltage at AIN1+ and AIN1- (P3.24 and P3.25). This
function is equivalent to the balance trim potentiometer found in analog drives. Lenze
recommends that this adjustment be made automatically using the “Adjust analog
voltage offset” button while the external analog reference signal commands zero speed.
5.5.6 Adjust Analog Voltage Offset
This control button is useful to allow the drive to automatically adjust the analog input
voltage offset. To use it, command the external reference source input at AIN1+ and
AIN1- (P3.24 and 25) to zero volts and then click this button. Any offset voltage at the
analog input will be adjusted out and the adjustment value will be stored in the “Analog
input offset” parameter.
5.6 Digital I/O
The 940 has four digital outputs. These outputs can be either assigned to one of the
following functions, or be used by the drives internal User Program
• Not Assigned No special function assigned. Output can be used by the
User Program.
• Zero Speed Output activated when drive is at zero speed, refer to
“Velocity Limits Group” (Section 5.7) for settings.
• In Speed Window Output activated when drive is in set speed window, refer to
“Velocity Limits Group” (Section 5.7) for settings.
• Current Limit Output activated when drive detects current limit.
• Run Time Fault A fault has occurred. Refer to Section 8.3 for fault details.
• Ready Drive is enabled.
• Brake Command for the holding brake option (E94ZAHBK2) for
control of a motor mounted brake. This output is active 10ms
after the drive is enabled and deactivates 10ms before the
drive is disabled.
• In position Position mode only. Refer to Programming Manual for details
5.6.1 Digital Input De-bounce Time
Sets de-bounce time for the digital inputs to compensate for bouncing of the switch or
relay contacts. This is the time during an input transition that the signal must be stable
before it is recognized by the drive.