Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty - Manual (Page 131)

Troubleshooting the Drive 5-17
.
Table 5.11 – Drive Does Not Respond to Changes in Speed Command
Indication Cause(s) Corrective Action
LCD OIM Status
Line indicates “At
Speed” and output
is 0 Hz. No value is coming from the
source of the command. 1. If the source is an analog
input, check wiring and use
a meter to check for
presence of signal.
2. Check Commanded Freq (2)
for correct source.
None Incorrect reference source
has been programmed. 3. Check Speed Ref Source
(213) for the source of the
speed reference.
4. Reprogram Speed Ref A Sel
(90) for correct source.
None Incorrect reference source is
being selected via remote
device or digital inputs. 5. Check Drive Status 1 (209),
bits 12 - 15 for unexpected
source selections.
6. Check Dig In Status (216) to
see if inputs are selecting an
alternate source.
7. Reprogram digital inputs to
correct Speed Sel x option.
Table 5.12 – Motor and/or Drive Will Not Accelerate to Commanded Speed
Indication Cause(s) Corrective Action
Acceleration time is
excessive. Incorrect value in Accel
Time “x” (140, 141). Reprogram Accel Time “x” (140,
141).
Drive is forced into
current limit, slowing
or stopping
acceleration. Excess load or short
acceleration time. Check Drive Status 2 (210), bit
10 to see if the drive is in current
limit.
Remove excess load or
reprogram Accel Time “x” (140,
141).
Speed command
source or value is not
as expected. Improper speed command. Check for the proper speed
command using steps 1 through
7 in table 5.11.
Programming is
preventing the drive
output from
exceeding limiting
values. Incorrect programming. Check Maximum Speed (82) and
Maximum Freq (55) to insure that
speed is not limited by
programming.