Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 116)

4-34 LiquiFlo AC Drive, Software Reference Version 6.4
P.031 to P.038 Preset Speed 1 through Preset Speed 8 (continued)
The encoder loss detection diagnostic is functional only when the drive is operating as
a speed regulator (not as a torque regulator).
When the diagnostic is enabled and feedback from the encoder is not detected, a
drive fault will be logged (EL will be displayed).
If the encoder fails, loss will be detected down to 1 RPM. If only one of the quadrature
feedback wires is disconnected, loss may not be detected below 15 RPM.
Figure 4.6 – Typical Preset Operation
P.039 Encoder Loss Enable
This parameter
enables the encoder
loss detection
diagnostic.
This diagnostic is
available for flux
vector control (FVC)
only.
Parameter Range: OFF = Disable encoder loss diagnostic
ON = Enable encoder loss diagnostic
Default Setting: OFF
Parameter Type: Tunable
Refer also to parameters: N/A
Closed
Run and Start
Closed Closed Closed Closed
Digital In 6
(Term. 19)
Closed Closed
Digital In 7
(Term. 18)
Closed
Digital In 8
(Term. 17)
P.031
Preset 1
(or TS
Analog in)
P.032
P.033
P.034
P.035
P.036
P.037
P.038