Omron MX2 Series User Manual page 532

10 Troubleshooting
Symptom
The motor rotation
speed does not
increase.
The Output Fre-
quency Set-
ting/Monitor (F001)
cannot be set via
the Digital Operator.
The specified
parameter does not
appear.
The Digital Opera-
tor keys do not
function.
10 - 16
Possible cause
There is a contact failure for the
analog voltage/current or vari-
able resistor input wiring.
The overload limit or overcur-
rent suppression function is
active.
The 1st Maximum Frequency
(A004) or the 1st/2nd Fre-
quency Upper Limit
(A061/A261) is set too low.
The set acceleration time is too
long.
The Multi-function Input S1 to
S7 Selection (C001 to C007) is
set to 06 (JG: Jogging) and that
terminal is ON.
The Multi-function Input S1 to
S7 Selection (C001 to C007)
are set to 02 (CF1) to 05 (CF4)
and those terminals are ON to
enable the Multi-step speed
setting.
The load is too heavy.
The motor brake is applied.
The 1st Frequency Reference
Selection (A001) is set to other
than Digital Operator.
The Multi-function Input S1 to
S7 Selection (C001 to C007) is
set to 51 (F-TM: Forced termi-
nal block) and that terminal is
ON.
The Display Selection (b037) is
set to 01 (Individual display of
functions), 04 (Basic display),
etc.
The Multi-function Input S1 to
S7 Selection (C001 to C007) is
set to 86 (DISP: Display fixed)
and that terminal is ON.
The Multi-function Input S1 to
S7 Selection (C001 to C007) is
set to 86 (DISP: Display fixed)
and that terminal is ON.
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Remedy
Check the input wiring.
• For the analog voltage or variable resistor
input wiring, measure the voltage between
the terminals FC and SC with a tester etc.
to check that the voltage is correct.
• For the analog current input wiring, with the
wires disconnected, measure the current
flowing between the power supply and FI
terminals with a tester etc. to check that the
current is correct.
Disable the function, or increase the level at
which the function is activated.
Change the set value.
Decrease the value set in the 1st/2nd Accel-
eration Time 1/2 (F002/F202/A092/A292).
Turn OFF the terminal to which the function is
allocated.
Disable the Multi-step speed setting. (When
this setting is enabled, multi-step speed oper-
ation is performed, so the motor runs accord-
ing to the frequency set in the Multi-step
Speed Reference 1 to 15 (A021 to A035).)
Reduce the load.
Release the brake.
Set the 1st Frequency Reference Selection
(A001) to 02 (Digital Operator).
Turn OFF the terminal to which the function is
allocated.
Set the Display Selection (b037) to 00 (Com-
plete display).
Turn OFF the terminal to which the function is
allocated.
Turn OFF the terminal to which the function is
allocated.
Reference
page
P. 2-10
P. 7-22
P. 7-76
P. 7-79
P. 5-21
P. 5-31
P. 5-33
P. 5-52
P. 5-50
−
−
P. 5-24
P. 7-55
P. 5-3
P. 7-57
P. 7-57