Omron SYSDRIVE 3G3MV User Manual page 273

Maintenance Operations
H The motor does not turn with input through the control
terminals. (The frequency reference is set to zero or different
from the set value.)
·The setting of the frequency reference is incorrect.
The frequency reference through analog input will be ignored if the Digital Operator
has been selected for frequency reference settings. The frequency reference
through digital input will be ignored if the Digital Operator has not been selected.
Check that the set value in n004 for frequency reference selection matches the
actual method used.
When using analog input, refer to 2-2-1 Terminal Block and check that the SW2 set-
tings conform with the actual input (voltage or current).
·The Inverter is in local mode.
The frequency reference can be given to the Inverter in local mode only with the
FREQUENCY adjuster or through a key sequence on the Digital Operator.
Check the LO/RE indicator. If "Lo" is displayed, the Inverter is in local mode. Press
the Increment Key so that "rE" will be displayed.
If the above operation is not possible, multi-function input will be set to local/remote
selection. In that case, the mode can be switched only through the corresponding
multi-function input terminal. Set the input terminal to OFF so that the Inverter will be
in remote mode.
·The gain and bias settings of the analog input are incorrect.
Check that the frequency reference gain in n060 and the frequency reference bias in
n061 conform with the actual analog input characteristics.
The auxiliary frequency reference and frequency gain are not input by the multi-func-
·
tion analog inputs
If frequency reference 2 is selected when an auxiliary frequency reference is set for a multi-
function analog input, the analog value of the multi-function analog input will become the
frequency reference. Also, if the frequency gain is set, the specified frequency will be multi-
plied by a factor proportional to the analog value of the multi-function input. In either case, if
no analog voltage is input by the multi-function analog input, the Inverter will not operate.
Check the multi-function analog input terminal parameters (n077, n078) and the wiring.
H The motor stops during acceleration or when a load is
connected.
·The load may be too big.
The 3G3MV has a stall prevention function and automatic torque boost function, but
the motor responsiveness limit may be exceeded if acceleration is too rapid or if the
load is too big.
8-20
.
Chapter 8