Analog Input - Emerson Epsilon Eb Series Reference Manual

Analog Input

The Analog Input can be used as a velocity or torque command. The drive accepts a ±10 VDC
differential analog command on pins 14 and 15 of the Command Connector and has 14 bits
of resolution.
The Analog Input Bandwidth, Analog Input Full Scale and Analog Input Zero Offset
parameters are applied to the Analog Input to generate either an analog velocity or torque
command. These three parameters can be edited using PowerTools, a FM-P or serially using
Modbus.
Analog Bandwidth
The value of the parameters sets the Low Pass Filter cutoff frequency applied to the analog
command input. Signals that exceed this frequency are filtered at a rate of 20 dB/decade.
Analog Full Scale
This parameter specifies the full scale voltage for the analog input. When the drive receives
an analog input equal to the Analog Input Full Scale parameter, the drive will command either
Full Scale Velocity or Full Scale Torque depending on the operating mode.
Analog Zero Offset
Analog Input Zero Offset is used to null any input voltage that may be present at the drive
whewn a zero velocity or torque is commanded by a controller. The amount of offset can be
read with PowerTools software or a FM-P using the following procedure:
1. Provide the zero velocity command to the analog input on the command connector.
2. Read the Analog Input Value.
3. Enter the Analog Input Value in the Analog Input Zero Offset.
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Operational Overview
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