SJ700
2
Inverter
Oper
ati
ons
and Monitor
ing
4–61
Inverter Ready
Signal
The inverter turns ON the Inverter Ready Signal [IRDY] output when it is ready to receive an
operation command such as Run Forward, Run Reverse, or Jog. Otherwise, [IRDY] will be
OFF and the inverter cannot accept operation commands. If [IRDY] is OFF, then check the
input power supply voltage at the [R], [S], and [T] terminals to be sure the voltage is within the
input specification range. The [IRDY] output is OFF when the input power is provided only to
the control power supply,
Forward/Reverse
Rotation Signals
The Forward Rotation Signal [FWR] is ON only when the inverter is driving the motor in the
foward
direction. Similarly, the Reverse Rotation Signal [RVR] is ON only when the inverter is
driving the motor in the
reverse
direction. Both signals are OFF when the motor is stopped.
Major Failure
Signal
The Major Failure Signal [MJA] indicates that a particular type of error event has occurred,
resulting in an inverter trip. In addition to causing the normal trip alarm, the following error
events also will turn ON the [MJA] output, when assigned to an intelligent output terminal.
Opt. Code
50
Symbol
[IRDY]
Valid for
Outputs
[11 to [15],
[ALx]
Required
Settings
none
Default
terminals
Requires
config.
Opt. Code
and
Symbol
51=[FWR]
52=[RVR]
Valid for
Ouputs
[11 to [15],
[ALx]
Required
Settings
none
Default
terminal
Requires
config.
Output frequency (Hz)
t
0
t
Forward Rotation Signal [FWR]
t
Reverse Rotation Signal [RVR]
Opt. Code
53
Symbol
[MJA]
Valid for
Outputs
[11 to [15],
[ALx]
Required
Settings
none
Default
terminals
Requires
config.
Error
Code
Name
E 10
CT (current transformer) error
E 1 1
CPU error
E 14
Ground fault
E20
Inverter thermal trip with low fan speed
E23
Gate array error
E25
Main circuit error