Schneider Electric ALTIVAR 58 TRX - Manual (Page 63)

Altivar ® 58 TRX AC Drives
Assignment of Analog Outputs (AOx)
63
09/2003 © 2000–2003 Schneider Electric All Rights Reserved
ASSIGNMENT OF ANALOG OUTPUTS (AOx)
The following sections describe the possible assignments of the Analog Outputs (AOx) on the drive
controller and on the optional Extension Cards. The analog output is a current output. The minimum and
maximum values are configurable, with a range of 0-20 mA, as shown in the graph to the left.
Motor Current
When configured for motor current, the analog output provides a signal proportional to motor current.
The minimum configured value corresponds to zero, while the maximum configured value of the analog
output corresponds to 200% of the drive controller’s constant-torque rating.
Output Frequency
When configured for output frequency, the analog output provides a signal proportional to motor
frequency estimated by the drive controller. The minimum configured value corresponds to zero, while
the maximum configured value of the analog output corresponds to the maximum frequency setting, not
the high speed setting.
Ramp Output
When configured for ramp output, the analog output provides a signal proportional to the frequency the
drive controller is commanding the motor to run. The minimum configured value corresponds to zero,
while the maximum configured value of the analog output corresponds to the maximum frequency
setting, not the high speed setting.
Motor Torque
When configured for motor torque, the analog output provides a signal proportional to motor torque as
an absolute value. The minimum configured value corresponds to zero, while the maximum configured
value of the analog output corresponds to 200% of the nominal motor torque.
Signed Motor Torque
When configured for signed motor torque, the analog output provides a signal proportional to motor
torque and provides an indication of braking torque or motoring torque. The minimum configured value
corresponds to 200% of the braking torque, while the maximum value of the analog output corresponds
to 200% of the nominal motor torque. Zero torque corresponds to the average torque value ([minimum
value + maximum value] divided by 2).
Signed Ramp
When configured for signed ramp output, the analog output provides a signal proportional to the
frequency the drive controller is commanding the motor to run in the reverse or forward direction. Zero
frequency corresponds to:
(minimum value + maximum value) / 2.
The minimum configured value corresponds to the maximum frequency in the reverse direction, while
the maximum configured value corresponds to the maximum frequency in the forward direction.
PI Setpoint
When configured for PI setpoint, the analog output provides a signal proportional to the PI setpoint being
provided to the drive controller. The minimum configured value corresponds to the minimum setpoint,
while the maximum configured value corresponds to the maximum setpoint.
PI Feedback
When configured for PI feedback, the analog output provides a signal proportional to the PI feedback
being provided to the drive controller. The minimum configured value corresponds to the minimum
feedback, while the maximum configured value corresponds to the maximum feedback.
0 mA
4 mA
Minimum
20 mA
20 mA
Maximum
Max.
Min.
An
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ra
f.e
p
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Analog Output
Ranges