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Programming Your Application
690+ Series Frequency Inverter
SPEED FEEDBACK REV/S
Range: —.xx rev/s
This parameter changes according to the CONTROL MODE (MOTOR DATA function
block):
•
In CLOSED-LOOP VEC mode the parameter shows the mechanical speed of the motor
shaft in revolutions per second as calculated from the Encoder Technology Box.
•
In SENSORLESS VEC mode the parameter shows the calculated mechanical speed of the
motor shaft in revolutions per second.
•
In VOLTS / Hz mode, the parameter shows the motor synchronous speed in revolutions
per second.
SPEED FEEDBACK %
Range: —.xx %
This parameter changes according to the CONTROL MODE (MOTOR DATA function
block):
•
In CLOSED-LOOP VEC mode the parameter shows the mechanical speed of the motor
shaft as a percentage of the user maximum speed setting (MAX SPEED in the SETPOINT
SCALE function block) as calculated from the Encoder Technology Box.
•
In SENSORLESS VEC mode the parameter shows the calculated mechanical speed of the
motor shaft as a percentage of the user maximum speed setting (MAX SPEED in the
SETPOINT SCALE function block).
•
In VOLTS / Hz mode, the parameter shows the electrical drive output frequency as a
percentage of the user maximum speed setting (MAX SPEED in the SETPOINT SCALE
function block).
ENCODER FBK %
Range: —.xx %
This parameter shows the mechanical speed of the motor shaft, calculated from the Encoder
Technology Box, as a percentage of the user maximum speed setting (MAX SPEED in the
SETPOINT SCALE function block).
ENCODER COUNT
Range: —.
In QUADRATURE MODE (see ENCODER MODE parameter) this increments/decrements
@ 4 x line rate, i.e. 1 revolution = 4000 for a 1000 line encoder. In other modes it
increments/decrements @ line rate, i.e. 1 revolution = 1000 for a 1000 line encoder.
This is a 16-bit register which is incremented or decremented by the pulses from the encoder.
It is useful to check that the encoder is operating, and to measure the encoder lines, if this is
not known. Rotate the motor shaft through 1 revolution and note the difference between
readings at the start and finish.
In QUADRATURE MODE the difference should be 4 times the encoder lines, in other modes
the difference should be equal to the encoder lines.
For greater accuracy, rotate the shaft through several revolutions.
The direction of count is unaffected by ENCODER INVERT.
TORQUE FEEDBACK
Range: —.xx %
Shows the estimated motor torque, as a percentage of rated motor torque.
FIELD FEEDBACK
Range: —.xx %
A value of 100% indicates the motor is operating at rated magnetic flux (field).
MOTOR CURRENT %
Range: —.xx %
This diagnostic contains the level of rms line current being drawn from the Inverter and is
seen as a % of the MOTOR CURRENT parameter setting in the MOTOR DATA function
block.
MOTOR CURRENT
Range: —.xx A
This diagnostic contains the level of rms line current being drawn from the Inverter.