Allen-Bradley PowerFlex 70 Reference Manual

Analog Inputs 2-17
Signal Loss
[Analog In 1, 2 Loss]
Signal loss detection can be enabled for each analog input. The [Analog In x
Loss] parameters control whether signal loss detection is enabled for each
input and defines what action the drive will take when loss of any analog
input signal occurs.
One of the selections for reaction to signal loss is a drive fault, which will
stop the drive. All other choices make it possible for the input signal to
return to a usable level while the drive is still running.
• Hold input
• Set input Lo
• Set input Hi
• Goto Preset 1
• Hold Output Frequency
If the input is in current mode, 4 mA is the normal minimum usable input
value. Any value below 3.2 mA will be interpreted by the drive as a signal
loss, and a value of 3.8 mA will be required on the input in order for the
signal loss condition to end.
If the input is in unipolar voltage mode, 2V is the normal minimum usable
input value. Any value below 1.6 volts will be interpreted by the drive as a
signal loss, and a value of 1.9 volts will be required on the input in order for
the signal loss condition to end.
Value Action on Signal Loss
0 Disabled (default)
1Fault
2 Hold input (continue to use last frequency command.)
3 Set Input Hi - use [Minimum Speed] as frequency command.
4 Set Input Lo - use [Maximum Speed] as frequency command.
5 use [Preset 1] as frequency command.
6 Hold Out Freq (maintain last output frequency)
4 mA
3.8 mA
3.2 mA
Signal Loss
Condition
End Signal Loss
Condition

Allen-Bradley PowerFlex 70 Specifications

General

Input Voltage	200-240V AC, 380-480V AC, 500-600V AC
Frequency Range	0 - 400 Hz
Humidity	5% to 95% non-condensing
Output Voltage	0 to Input Voltage
Control Methods	Sensorless Vector Control
Communications	Ethernet/IP, DeviceNet, ControlNet
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Ground Fault
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Enclosure Rating	IP20, NEMA Type 1